Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 32.pdf: 421716 bytes, checksum: f1dbd1cd2f5a9514dcb522400e36103c (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 22564 bytes, checksum: ff373f1ad387898ef8ba4f8bc9e37073 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:28:44Z (GMT) No. of bitstreams: 5 32.pdf: 421716 bytes, checksum: f1dbd1cd2f5a9514dcb522400e36103c (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 22564 bytes, checksum: ff373f1ad387898ef8ba4f8bc9e37073 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:28:44Z (GMT). No. of bitstreams: 5 32.pdf: 421716 bytes, checksum: f1dbd1cd2f5a9514dcb522400e36103c (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 22564 bytes, checksum: ff373f1ad387898ef8ba4f8bc9e37073 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2008 / O assa-peixe (Vernonia polyanthes Less.) esp?cie pertencente ? fam?lia Asteraceae, possui propriedades medicinais e tem potencial ap?cola. Apesar de seu intenso uso popular, s?o escassas as informa??es sobre os fatores que condicionam a germina??o e o armazenamento de suas sementes. Dessa forma, o objetivo do presente trabalho foi avaliar a qualidade fisiol?gica de sementes de assa-peixe em rela??o ao efeito dos fatores temperatura/luz, em diferentes tipos de c?maras, e a influ?ncia dos diferentes tipos de ambientes/embalagens, durante o per?odo de armazenamento. A pesquisa foi dividida em duas partes. A primeira parte consistiu em avaliar o efeito dos fatores temperatura e luz sobre o comportamento fisiol?gico das sementes de assa-peixe, atrav?s dos testes de vigor (teste de primeira contagem da germina??o e ?ndice de velocidade de germina??o) e germina??o, em diferentes tipos de c?maras, sob temperaturas constantes (Mangelsdorff e B.O.D.) e alternadas (B.O.D.), na presen?a e aus?ncia de luz. Os tratamentos foram dispostos em arranjo fatorial, com delineamento inteiramente casualizado e os dados foram submetidos ? an?lise de vari?ncia, com as m?dias comparadas entre si pelo teste de Tukey a 5% de probabilidade. Pelos resultados constatou-se que esta esp?cie comportou-se como ?fotobl?stica preferencial?, pelo fato da germina??o, ter ocorrido na presen?a e na aus?ncia de luz, por?m, esta foi favorecida em presen?a de luz. As maiores porcentagens de germina??o de sementes de assa-peixe foram obtidas a 25?C, independente do tipo de c?mara utilizada (Mangelsdorff ou B.O.D.), e na faixa de temperatura alternada 15-25?C (em B.O.D.), na presen?a de luz. As sementes de assa-peixe n?o germinaram sob temperatura de 40?C. A segunda parte da pesquisa consistiu em avaliar a influ?ncia dos diferentes tipos de ambientes e embalagens e do tempo de armazenamento sobre a qualidade fisiol?gica das sementes. Foram testados tr?s per?odos de armazenamento (0, 136 e 230 dias), sobre duas condi??es, em geladeira (5 ? 2?C) e ambiente de laborat?rio (22 ? 2?C), e tr?s tipos de embalagens (vidro, pl?stica e multifoliada). Determinou-se a porcentagem da umidade, vigor (teste de primeira contagem da germina??o e ?ndice de velocidade de germina??o) e germina??o. Os tratamentos foram dispostos em arranjo fatorial, com delineamento inteiramente casualizado e os dados foram submetidos ? an?lise de vari?ncia, com as m?dias comparadas entre si pelo teste Tukey a 5% de probabilidade. Foi verificado que o armazenamento das sementes de assa-peixe, em geladeira, proporcionou maiores valores para vigor e germina??o, com a embalagem de vidro apresentando melhor desempenho, comparados aos obtidos em ambiente de laborat?rio, independente da embalagem utilizada. O vigor e a germina??o das sementes de assa-peixe decrescem em fun??o do tempo, durante os 230 dias de armazenamento. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2008. / ABSTRACT The Vernonia polyanthes Less. is species belonging to the family Asteraceae has medicinal properties and have the potential apiculture. Despite their intense use popular, there are few information about the factors that affect the germination and storing their seeds. Thus, the objective of this study was the physiological quality of seeds of Vernonia polyanthes Less. in relation to the effect of factors temperature/light, in different types of chambers, and the influence of different types of environments/packaging, during the period of storage. The survey was divided into two parts. The first part of the research was to evaluate the effect of the factors temperature and light on the behavior physiological seeds of V. polyanthes Less., through testing of vigor (test first count of germination and germination speed index) and germination, using different types of chambers, under constant temperatures (Mangelsdorff and B.O.D.) and alternate temperatures (B.O.D.), in the presence and absence of light. The experimental design was completely randomized, in factorial scheme and the averages compared were by Tukey test at 5%. The species, behaved itself as "preferential fotobl?stica" because of germination, have occurred in the presence and absence of light, but this was better in the presence of light. The higher germination percentages the seeds of V. polyanthes Less. were obtained at 25?C, regardless of the type of chamber used (Mangelsdorff and B.O.D.), and on diary alternating temperatures 15-25?C (in B.O.D.), in the presence of light. The temperature of 40?C was not germination of seeds of V. polyanthes Less.. The second part of the research was to evaluate the influence of different types of environments and packaging and time of storage of seeds of V. polyanthes on the physiological quality seeds. It was tested three periods of storage (0, 136 and 230 days), on two conditions, in refrigerator (5? 2 C) and laboratory environment (22 ? 2 C), and three types of packaging (glass, plastic and multilayer). It was determined the percentage moisture, vigor (test first count of germination and germination speed index) and germination. The experimental design was completely randomized, in factorial scheme and the averages compared were by Tukey test at 5%. It was found that the storage of seeds of V. polyanthes Less. in refrigerator had better values for vigor and germination, with a pack of glass showing better performance, that when stored in laboratory conditions, regardless of the type of packaging used. The vigor and germination the seeds decreased after 230 days of storage.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 35.pdf: 1736830 bytes, checksum: 19df23eb1c087b7ade84208f507df746 (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 23422 bytes, checksum: b145eda3d84bdc4f56b389c0ab98d368 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:34:17Z (GMT) No. of bitstreams: 5 35.pdf: 1736830 bytes, checksum: 19df23eb1c087b7ade84208f507df746 (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 23422 bytes, checksum: b145eda3d84bdc4f56b389c0ab98d368 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:34:17Z (GMT). No. of bitstreams: 5 35.pdf: 1736830 bytes, checksum: 19df23eb1c087b7ade84208f507df746 (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20904 bytes, checksum: e09bf99e64678e4285abf3ef3e05412d (MD5) license_rdf: 23422 bytes, checksum: b145eda3d84bdc4f56b389c0ab98d368 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2011 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O trabalho teve por objetivo avaliar a efici?ncia do pol?mero de poliacrilamida e turnos de rega no crescimento do eucalipto (Eucalyptus urophylla). O experimento foi conduzido em casa de vegeta??o no Departamento de Agronomia da Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina-MG, no per?odo de outubro a maio de 2010. O delineamento foi de blocos casualizados, contendo quatro tratamentos (doses de pol?meros hidrorretentores: 0, 2, 4 e 8 gramas por planta). Cada bloco constituiu um turno de rega, sendo 1; 5; 10, 20 e 40 dias de intervalo entre irriga??es. Cada parcela foi constitu?da por 4 sacos contendo uma planta de eucalipto. N?o houve efeito das doses de pol?mero no crescimento da planta. Quanto ao conte?do de nutrientes, apenas o pot?ssio (raiz) e o cobre (caule) apresentaram diferen?as estat?sticas, sendo a dose de 8 gramas por planta a superior. O aumento dos turnos de rega proporcionou diminui??o em todas as caracter?sticas biom?tricas e no ac?mulo do conte?do dos nutrientes avaliados. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT The purpose of this work was to evaluate the efficiency of polyacrylamide polymer and irrigation frequency in the growth of eucaliptus (Eucalyptus urophylla). The experiment was conducted in a greenhouse, at the Agronomy Department of Federal University of the Jequitinhonha and Mucuri Valleys, Diamantina-MG, in the period from October to May, 2010. It was conducted in a 4 x 4 factorial way, with 16 treatments and 5 repetitions. There was used a randomized block design with four treatments (doses polymers hydroretentors: 0, 2, 4 and 8 grams per plant). Each block had an irrigation frequency, as following: 1, 5, 10, 20 and 40 days between irrigations. Each plot consisted of 4 bags containing one eucalyptus plant each. There were observed no effect of polymer doses on plant growth. Considering the nutrient content in the plant, only potassium (root) and copper (stem) showed statistical differences, with a dose of 8 grams more. The increase in irrigation frequency caused a decrease in all biometric characteristics and in the accumulation of the nutrients content.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:39:06Z (GMT) No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:39:06Z (GMT). No. of bitstreams: 5 36.pdf: 448536 bytes, checksum: a5dbf2e4dce517f8347874ee986cea66 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2011 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O objetivo do presente trabalho foi estimar os efeitos de popula??es, matrizes e idade da planta na express?o de vari?veis f?sicas, qu?micas e f?sico-qu?micas de frutos de pequizeiro. Colheram-se frutos oriundos de 15 matrizes em Curvelo e 15 em S?o Gon?alo do Rio Preto, Minas Gerais. A amostragem foi feita de maneira a se ter, em cada popula??o, matrizes com diferentes di?metros de tronco, sendo este ?ltimo uma estimativa da idade da planta. Para todas as vari?veis foram tomados dez frutos por matriz e as vari?veis qu?micas e f?sico-qu?micas foram avaliadas em cinco matrizes de cada popula??o. Avaliaram-se, em cada fruto, as vari?veis f?sicas: peso total; peso do mesocarpo externo; peso total dos put?mens; peso m?dio dos put?mens; n? de put?mens; peso total de polpa; e peso m?dio de polpa. As vari?veis qu?micas e f?sico-qu?micas, avaliadas na polpa, foram: umidade; cinzas; lip?deos; prote?nas; carboidratos totais; pH; s?lidos sol?veis totais; e acidez total titul?vel. O efeito de matrizes foi altamente significativo para todas as vari?veis avaliadas (P<1%), enquanto o de popula??es foi apenas para duas vari?veis (5%<P<10%). As estimativas das correla??es entre as vari?veis f?sicas avaliadas foram todas positivas, algumas significativas, enquanto que para as vari?veis qu?micas e f?sico-qu?micas observaram-se estimativas positivas e negativas, a maioria n?o significativa. As estimativas das correla??es entre o di?metro do tronco e as vari?veis f?sicas foram todas positivas, significativas apenas para duas vari?veis (P<5%). Para as vari?veis qu?micas e f?sico-qu?micas, observaram-se correla??es positivas e negativas, por?m n?o significativas. A sele??o de matrizes no campo para as caracter?sticas avaliadas que apresentaram correla??es n?o significativas ou significativas positivas deve promover ganhos gen?ticos nos descendentes se estes forem obtidos por propaga??o vegetativa, o mesmo n?o se podendo afirmar para descendentes obtidos por via sexuada. A idade da matriz n?o deve alterar os ganhos gen?ticos para estas vari?veis. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT The present work aimed to estimate population, mother tree and plant age effects on the expression of physical, chemical and physic-chemical traits on pequi fruits Seeds were collected from two populations and fifteen mother trees in each population, one located at Curvelo and another at S?o Gon?alo do Rio Preto, both from Minas Gerais State. The sampling was done in a way to sample trees among a range of trunk diameters, the last trait being an estimate of the tree age. Physical traits, evaluated on each of ten fruits sampled from all harvested trees, were: fruit total weight; external mesocarp weight; total weight of put?mens; mean weight of put?mens; number of put?mens; total weight of pulp; and mean weight of pulp. Chemical and physic-chemical traits, evaluated in five trees from each population, were: humidity; ashs; lipids; proteins; total carbohydrate; pH; total soluble solids; and total acidity. The mother trees effects were significant for all traits (P<1%), while the populations were only for two traits (5%<P<10%). Estimates of correlations among physical traits were all positive and some of them significant. For chemical and physic-chemical traits there were positive and negative correlations, most not significant. Estimates of correlations between trunk diameter and each physical variable were all positive, being significant for two traits (P<5%). Positive and negative but not significant correlations were observed for chemical and physic-chemical traits. Mother tree selection for traits that showed non significant or significant and positive correlations with trunk diameter may promote genetic gain in their descendents for vegetative propagation but the same assertion can?t be said when propagation is carried out by seeds. Mother tree age is not expected to cause any effect in genetic gains for these traits.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:34Z No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:45:27Z (GMT) No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:45:27Z (GMT). No. of bitstreams: 5 39.pdf: 622297 bytes, checksum: f0b6a4c72e9ca840834c09213d059a4b (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2011 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes)/MEC / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Funda??o de Apoio ao Ensino, Pesquisa e Extens?o (FAEPE) / Comparou-se a efetividade de linhagens melhoradas de tomateiro, ricas em 2-tridecanona (2-TD), zingibereno (ZGB) e acila??cares (AA), ou no tocante aos n?veis de resist?ncia ? tra?a-do-tomateiro Tuta absoluta. Tamb?m verificou-se se linhagens selecionadas para maiores densidades de tricomas glandulares, presumivelmente com maiores n?veis de 2-tridecanona, ? efetiva no sentido de promover maior resist?ncia ? tra?a. Como testemunhas suscet?veis foram utilizadas as linhagens TOM-584 e TOM-679, com n?vel normal dos tr?s aleloqu?micos. A linhagem melhorada TOM-687 (com alto teor de AA) foi utilizada como linhagem resistente padr?o, por ter sua resist?ncia amplamente documentada, juntamente com o tamb?m resistente acesso selvagem PI134417 (com alto teor de 2-TD). O experimento foi instalado em casa de vegeta??o em delineamento inteiramente casualizado. O acesso selvagem PI 134417 confirmou-se como altamente resistente. TOM-622 (rica em 2-TD), ZGB-703 (rica em ZGB) e TOM-687 apresentaram diminui??es significativas na ovoposi??o da tra?a-do-tomateiro, bem como no dano geral na planta, les?o nos fol?olos e porcentagem de fol?olos atacados, comparadas ?s testemunhas TOM-584 e TOM-679. Os n?veis de resist?ncia ? tra?a em TOM-622, ZGB-703 e TOM-687 foram similares entre si. Em geral os gen?tipos selecionados para maiores densidades de tricomas glandulares apresentaram n?veis de resist?ncia tamb?m superiores aos das testemunhas suscet?veis, destacando entre eles o tratamento BPX-367D-238-02. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT In Brazil the Cactaceae is represented by 160 species from which 26% occur on the rocky fields. Cipocereus minensis is an endemic Cactaceae from the rocky fields in the Minas Gerais? portion of the Espinha?o chain. In this research it was intended to evaluate the rhythms of flower and fruit production of the species, its floral and reproductive biology, and also know the floral visitors and the likely seed dispersers, in an area of the rocky fields of the Diamantina ? MG?s plateau. Seed germination tests have been performed and the initial plant growth on different substrates was analyzed. The species had floral traits such as nocturnal anthesis, white flowers, abundant volume of nectar and rigid perianth structures that suggested pollination by bats. However daily visitors as hummingbirds were also observed. The reproductive system of C. minensis is alogamic and self incompatible and the night visitors were more efficient than the daytime ones in the formation of fruits. The phenologic pattern of flowering and fruiting is sub-annual, with peak of flowering at the beginning and middle of the dry season, in april and july, respectively. Another peak was observed in the wet season in november, with lower production of flowers, but with a higher flower/fruit conversion rate . C. minensis is well adapted to the climatic seasonality. The fruits showed significant differences with respect to collection time for the length, diameter and weight, with higher measures in the wet season. The average number of seeds per fruit was 958.63 ? 369.35, the weight of 1000 seeds was 0.53 g and the mean length of the seeds was 1.5 mm. The highest germination rates were found after nine and twelve months of storage (75% and 72%, respectively) or in fruits collected with a more advanced stage of ripening (72%).In the initial growth the plants showed a higher diameter and height on the substrate prepared in the ratio 1:1:1, composed of sand, red soil and cow dung. The store promotes germination, but also in fruits collected in a more advanced stage of maturation. Substrates with better drainage and aeration favoring better initial development of this plant species. This information will provide subsidies for the development of strategies of conservation and management of the species.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:50:14Z (GMT) No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:50:14Z (GMT). No. of bitstreams: 5 41.pdf: 467693 bytes, checksum: 46ea478cf12119fee773189de4a6bf91 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Dentre as esp?cies mais utilizadas na implanta??o de pastagens est?o as do g?nero Brachiaria. Os benef?cios do uso de sementes de alta qualidade para forma??o de pastagem podem ser facilmente constatados pelo r?pido estabelecimento da forrageira, pastagem formada uniformemente e cobertura mais r?pida do solo, resultando em uma utiliza??o da pastagem em menor espa?o de tempo. Por?m, as metodologias utilizadas para avaliar a qualidade de suas sementes ainda n?o est?o bem definidas. O uso de testes de vigor ? uma ferramenta imprescind?vel para a avalia??o do potencial fisiol?gico dos lotes de sementes. Assim, objetivou-se com este estudo adequar os testes de envelhecimento acelerado e de condutividade el?trica, para avaliar o potencial fisiol?gico de lotes de sementes de Brachiaria brizantha das cultivares Marandu e Xara?s, cada uma delas representada por quatro lotes. Para o teste de envelhecimento acelerado as sementes foram submetidas ao envelhecimento acelerado tradicional e com solu??o saturada de NaCl, em cinco per?odos de envelhecimento, 0; 24; 48; 72 e 96 horas. Para o teste de condutividade el?trica, as sementes foram submetidas a 12 per?odos de imers?o em ?gua, por 2; 4; 6; 8; 10; 12; 14; 16; 18; 20; 22 e 24 horas, utilizando-se 25 sementes em 25 mL e em 50 mL, 50 sementes em 50 mL e em 75 mL de ?gua. Para caracterizar o perfil dos lotes, foi determinado o grau de umidade, os testes de germina??o, primeira contagem da germina??o, ?ndice de velocidade de germina??o, estande inicial, emerg?ncia e ?ndice de velocidade de emerg?ncia. Conclui-se que o teste de envelhecimento acelerado possibilita a separa??o dos lotes de B. brinzatha cv. Marandu e cv. Xara?s, pelo m?todo com solu??o saturada de NaCl por 72 horas e 24 horas, respectivamente. No teste de condutividade el?trica, o per?odo de imers?o de 14 horas, utilizando-se 50 sementes em 50 mL, para a cv Marandu, e utilizando-se 25 sementes em 25 mL ou 50 sementes em 50 mL de ?gua, para a cv Xara?s ? adequado para avalia??o do potencial fisiol?gico das sementes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Among the species most commonly used in the implementation of the pastures are of the genus Brachiaria. The benefits of using high quality seeds for pasture formation can be easily found by the rapid establishment of forage, pasture formed uniformly and cover the ground more quickly, resulting in a pasture utilization in shorter time. However, the methodologies used to evaluate the quality of their seeds are still poorly defined. The use of vigor testing is an essential implement for the evaluation of the physiological potential of seed lots. The objective of this research was adjust the accelerated aging tests and electrical conductivity, to evaluate the physiological potential of seed lots from Brachiaria brizantha Marandu and Xara?s cultivars, each represented by four lots. For the accelerated aging test, seeds were submitted to traditional accelerated aging and with saturated NaCl solution, five periods of aging, 0, 24, 48, 72 and 96 hours. For the electrical conductivity test, seeds were submitted to 12 periods of imbibitions in water for 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 hours, using samples of 25 seeds in 25 mL and 50 mL, 50 seeds in 50 mL and 75 mL of water. To characterize the profile of lots, were determined moisture content, germination tests, first count of germination, speed of germination, initial stand, emergence, and? speed of emergence index. The accelerated aging test makes possible the separation of lots of B. brinzatha cv Marandu and cv Xara?s by the method with saturated NaCl solution for 72 hours and 24 hours, respectively. For the electrical conductivity test, the imbebition period during 14 hours using 50 seeds in 50 mL to Marandu and using 25 seeds in 25 mL or 50 seeds in 50 mL of water for cultivar Xara?s is appropriate for evaluating the seed physiological potential.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:58:40Z (GMT) No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T18:58:42Z (GMT). No. of bitstreams: 5 43.pdf: 544294 bytes, checksum: cfadb6b62ac14a80b845bf3c73c07552 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / O entendimento da interfer?ncia promovida pelas esp?ciesexistentesna comunidadede plantas daninhas doolival esuas densidadesrelativas s?oconsidera??es importantes nomanejo dessas plantas para manter o equil?brio da competi??o, permitindo que o cultivo da oliveira seja beneficiado. A pesquisa foi realizada com o objetivo de avaliar a capacidade competitiva de mudas de oliveira cultivadas com diferentes esp?cies e densidades de plantas daninhas sobre o crescimento vegetativo e os teores de nutrientes. Para avaliar a capacidade de competi??o da oliveira com as plantas daninhas foram conduzidos tr?s experimentos em casa de vegeta??o do Setor de Fruticultura da Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG. No primeiro experimento avaliou-se o crescimento inicial de mudas de duas cultivares de oliveira ?Arbequina? e ?Koroneiki? convivendo com cinco esp?cies de plantas: Bidens pilosa, Brachiaria brizantha, Cenchrus echinatus,Canavalia ensiformis e Lupinus albus, e um tratamento sem conviv?ncia com plantas daninhas por um per?odo de 60 dias. Observou-se que a cultivar Arbequina mostrou-se mais tolerante a interfer?ncia das esp?cies de plantas. B. pilosa, C. ensiformes e L. albus foram as esp?cies com maior potencial de interfer?ncia no crescimento inicial das mudas de oliveira. No segundo, avaliou-se o crescimento de duas cultivares de oliveira, ?Arbequina? e ?Ascolano? cultivadas com quatro esp?cies de plantas competidoras, Amaranthus retroflexus, B. brizantha, B. pilosa, e C. echinatus e as testemunhas, que foram as mudas de oliveiras e as plantas daninhas de cada esp?cie sem competi??o por um per?odo de 90 dias. A competi??o com as plantas daninhas interferiu no crescimento e nos teores de nutrientes de mudas de oliveira. A ?Ascolano? mostrou-se mais tolerante a competi??o com as esp?cies de plantas daninhas. A. retroflexus e B. pilosa foramas esp?cies com maior potencial de competi??o com mudas de oliveira. No terceiro experimento, foi avaliada a conviv?ncia das mudas de oliveira ?Arbequina? e ?Ascolano? com cinco densidades de B.brizantha, zero, uma, duas, tr?s e quatro plantas por vaso por um per?odo de 70 dias. Observou-se que a B. brizantha interferiu negativamente no crescimento vegetativo da oliveira. A cultivar ?Ascolano? apresentou maior capacidade competitiva com todas as densidades de B. brizantha. O aumento da densidade de B. brizantha interferiu no estado nutricional das mudas de oliveira. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT Understanding of the interference promoted by species existing in weed community of olive groves and their densities are important considerations in management of these plants to maintain the competition balance, allowing the cultivation of olive trees be favored. The research was conducted with the aim of evaluate the competitive ability of olive nursery trees grown with different species and weed densities on vegetative growth and nutrients contents. Three experiments was conducted in a greenhouse of Setor de Fruticultura of Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina, MG to evaluate the competition ability of olive tree with the weeds. The first experiment evaluated the nursery tree growth of two olive cultivars ?Arbequina? and ?Koroneiki? coexisting with five plant species: Bidens pilosa, Brachiaria brizantha, Cenchrus echinatus, Canavalia ensiformis and Lupinus albus and one treatment without coexistence for a period of 60 days. It was observed that the ?Arbequina? cultivar was more tolerant to interference of plant species. B. pilosa, C. ensiformes and L. albus were the species with greater potential for interference on the growth of olive nursery trees. In the second it was evaluated the growth of two olive cultivars, ?Arbequina? and ?Ascolano? planted with four species of competing plants, B. brizantha, A. retroflexus, B. pilosa and C. echinatus and the controls, which were the olive nursery trees and the weeds of each species without competition for a period of 90 days. Competition with weeds affected the growth and nutrients contents of olive nursery trees. ?Ascolano? was more tolerant to the competition with weed species. The species A. retroflexus and B. pilosa were the species with the greatest potential competition with olive nursery tree. In the third experiment was evaluated the relationship between the olive nursery trees ?Arbequina? and ?Ascolano? with four densities of B. brizantha zero, one, two, three and four plants per pot for a period of 70 days. It was observed that B. brizantha affected negatively in vegetative growth of olive nursery trees. The cultivar ?Ascolano? showed greater competitive ability with all densities of B. brizantha. The increased density of B. brizantha affected the nutritional status of olive nursery trees.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:01:57Z (GMT) No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:01:57Z (GMT). No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / (Fenologia, biologia reprodutiva, germina??o e desenvolvimento inicial de Cipocereus minensis subsp. leiocarpus N.P.Taylor & Zappi (Cactaceae) no planalto de Diamantina-MG). No Brasil a fam?lia Cactaceae ? representada por 160 esp?cies, das quais 26% ocorrem em campos rupestres. Cipocereus minensis ? uma Cactaceae end?mica dos campos rupestres da por??o mineira da cadeia do Espinha?o. Neste estudo pretendeu-se avaliar os ritmos de produ??o de flores e frutos da esp?cie, sua biologia floral e reprodutiva, al?m de conhecer seus visitantes florais e prov?veis dispersores de sementes, numa ?rea de campo rupestre do planalto de Diamantina-MG. Foram realizados testes de germina??o de sementes e avaliado o desenvolvimento inicial das plantas em diferentes substratos. A esp?cie apresentou caracter?sticas florais como antese noturna, flores brancas, volume abundante de n?ctar e estruturas do perianto r?gidas que sugeriram poliniza??o por morcegos. No entanto, observou-se tamb?m a presen?a de polinizadores diurnos como beija-flores. O sistema reprodutivo de C. minensis ? alog?mico, auto-incompat?vel e os visitantes noturnos foram mais eficientes que os diurnos na forma??o de frutos. O padr?o fenol?gico de flora??o e frutifica??o ? subanual, com picos de flora??o no in?cio e meio da esta??o seca, em abril e julho, respectivamente. Um outro pico foi observado na esta??o ?mida, em novembro, com menor produ??o de flores, por?m com maior taxa de convers?o flor/fruto. C. minensis ? uma esp?cie bem adaptada ? sazonalidade clim?tica. Os frutos apresentaram diferen?as significativas com rela??o ? ?poca de coleta quanto ao comprimento, di?metro e peso, com maiores valores na esta??o ?mida. A m?dia do n?mero de sementes por fruto foi de 958,63 ? 369,35, o peso de 1000 sementes foi de 0,53 g e a m?dia do comprimento das sementes foi de 1,5 mm. As maiores taxas de germina??o foram obtidas ap?s nove e doze meses de armazenamento (75% e 72%, respectivamente), ou em frutos coletados no est?gio mais avan?ado de matura??o (72%). No crescimento inicial as plantas apresentaram maiores di?metros e alturas no substrato preparado na propor??o 1:1:1, composto de areia, solo vermelho e esterco de boi. O armazenamento favoreceu a germina??o, que tamb?m foi alta em frutos coletados em est?gios mais avan?ados de matura??o. Substratos com melhor drenagem e aera??o favoreceram um melhor desenvolvimento inicial de plantas dessa esp?cie. Estas informa??es dar?o subs?dios para o desenvolvimento de estrat?gias de conserva??o e manejo da esp?cie. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT In Brazil the Cactaceae is represented by 160 species from which 26% occur on the rocky fields. Cipocereus minensis is an endemic Cactaceae from the rocky fields in the Minas Gerais? portion of the Espinha?o chain. In this research it was intended to evaluate the rhythms of flower and fruit production of the species, its floral and reproductive biology, and also know the floral visitors and the likely seed dispersers, in an area of the rocky fields of the Diamantina ? MG?s plateau. Seed germination tests have been performed and the initial plant growth on different substrates was analyzed. The species had floral traits such as nocturnal anthesis, white flowers, abundant volume of nectar and rigid perianth structures that suggested pollination by bats. However daily visitors as hummingbirds were also observed. The reproductive system of C. minensis is alogamic and self incompatible and the night visitors were more efficient than the daytime ones in the formation of fruits. The phenologic pattern of flowering and fruiting is sub-annual, with peak of flowering at the beginning and middle of the dry season, in april and july, respectively. Another peak was observed in the wet season in november, with lower production of flowers, but with a higher flower/fruit conversion rate . C. minensis is well adapted to the climatic seasonality. The fruits showed significant differences with respect to collection time for the length, diameter and weight, with higher measures in the wet season. The average number of seeds per fruit was 958.63 ? 369.35, the weight of 1000 seeds was 0.53 g and the mean length of the seeds was 1.5 mm. The highest germination rates were found after nine and twelve months of storage (75% and 72%, respectively) or in fruits collected with a more advanced stage of ripening (72%).In the initial growth the plants showed a higher diameter and height on the substrate prepared in the ratio 1:1:1, composed of sand, red soil and cow dung. The store promotes germination, but also in fruits collected in a more advanced stage of maturation. Substrates with better drainage and aeration favoring better initial development of this plant species. This information will provide subsidies for the development of strategies of conservation and management of the species.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:04:02Z (GMT) No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:04:05Z (GMT). No. of bitstreams: 5 48.pdf: 312989 bytes, checksum: d64deaf4dec63e71c21cf34cb462dbbf (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O manejo das plantas daninhas ? necess?rio nas culturas agr?colas para que se evite a competi??o e perdas na produ??o. O uso de herbicidas ? comum no controle das plantas daninhas, e pode causar impacto negativo ao meio ambiente. O objetivo desse trabalho foi avaliar a seletividade de herbicidas, aplicados nas culturas do milho e do eucalipto, sobre os insetos de controle biol?gico de pragas Podisus nigrispinus Dallas, 1851 (Heteroptera Pentatomidae) e Palmistichus elaeisis Delvare & LaSalle, 1993 (Hymenoptera: Eulophidae). Foram realizados tr?s experimentos em laborat?rio. No primeiro, avaliou-se a seletividade dos herbicidas atrazine e nicosulfuron e a mistura destes, e mais o controle (?gua), aplicados em posturas e em diferentes est?dios biol?gicos de P. nigrispinus. A viabilidade dos ovos de P. nigrispinus diminuiu sob a??o dos herbicidas, sem diferirem quanto ao tempo de eclos?o. A sobreviv?ncia de ninfas foi baixa sob a??o dos herbicidas, sendo mais afetada negativamente com a mistura de herbicidas. Para a aplica??o em cada est?dio, observou-se baixa sobreviv?ncia de ninfas do primeiro ao terceiro est?dios com o herbicida atrazine isolado, ou em mistura, e at? o segundo est?dio para o nicosulfuron. Observou-se em todos os demais est?dios do inseto a menor seletividade ? mistura dos herbicidas comparados ao efeito isolado. O segundo experimento avaliou-se a seletividade de herbicidas registrados para a cultura do milho para o inimigo natural P. elaeisis. Os tratamentos foram pupas do hospedeiro alternativo Tenebrio molitor Linnaeus, 1758 (Coleoptera: Tenebrionidae) pulverizadas com os herbicidas atrazine, nicosulfuron, paraquat e tembotrione, na dose comercial, mais o tratamento controle com ?gua. Pupas de T. molitor foram submergidas em solu??o herbicida e logo ap?s, expostas ao parasitismo por seis f?meas de P. elaeisis. Os herbicidas atrazine e paraquat n?o foram seletivos a P. elaeisis, apresentando elevada toxicidade. J? o herbicida nicosulfuron reduziu a raz?o sexual de P. elaeisis, o que pode comprometer as gera??es subsequentes. O herbicida tembotrione foi seletivo a P. elaeisis apresentando menor risco quando indicado em programas de manejo integrado de insetos. No terceiro experimento avaliou-se a seletividade de herbicidas usados na cultura do eucalipto no parasitoide P. elaeisis. Os tratamentos constaram das doses comerciais dos herbicidas sulfentrazone, oxyfluorfen, glyphosate, glufosinato sal de am?nio e isoxaflutole, al?m do controle, apenas com ?gua. Os herbicidas foram aspergidos em pupas do hospedeiro alternativo T. molitor, as quais foram expostas ao parasitismo por seis f?meas de P. elaeisis. Os herbicidas glufosinato sal de am?nio e oxyfluorfen n?o foram seletivos ?s f?meas de P. elaeisis, e reduziram o parasitismo e a emerg?ncia desse parasitoide. O n?mero de indiv?duos e f?meas produzidas por f?mea foram maiores com isoxaflutole, portanto apresentando menor risco quando utilizado em programas de manejo integrado de pragas na cultura do eucalipto. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The management of weeds in agricultural crops is necessary to avoid competition and yield losses. Herbicide use is common in weed control, and can negatively impact the environment. The aim of this study was to evaluate the toxicity of herbicides applied on corn [Zea mays L. (Poaceae)] and eucalyptus [Eucalyptus sp. (Myrtaceae)] on the Podisus nigrispinus Dallas, 1851 (Heteroptera Pentatomidae) and Palmistichus elaeisis Delvare & LaSalle, 1993 (Hymenoptera: Eulophidae). Three experiments were conducted in the laboratory. At first, we evaluated the selectivity of the herbicides atrazine and nicosulfuron and mixture, in commercial dosage, applied in different postures and biological stages of P. nigrispinus. The viability of eggs of P. nigrispinus decreased under the action of herbicides, without differences regarding the time of hatching. The survival of nymphs was low in the herbicides being more adversely affected with the herbicide mixture. For the application at each stage there was low survival of nymphs of the first to third stage with the herbicide atrazine, alone or in mixture until the second stage to nicosulfuron. It was observed in all other stages of the insect to lower selectivity compared to the herbicide mixture to the isolated effect. The second chapter assessed the selectivity of herbicides registered for corn for the natural enemy of P. elaeisis. The treatments were pupae of the alternative host Tenebrio molitor Linnaeus, 1758 (Coleoptera: Tenebrionidae) sprayed with the herbicide atrazine, nicosulfuron, paraquat and tembotrione in commercial dosage over the control treatment with water. Pupae of T. molitor were overwhelmed with the solution herbicidica and soon after exposed to parasitism by six females of P. elaeisis. The herbicides atrazine and paraquat were not selective to P. elaeisis, with high toxicity. The herbicide nicosulfuron reduced the sex ratio of P. elaeisis, which may affect subsequent generations. The herbicide tembotrione was selective to P. elaeisis and can be displayed in integrated pest management of insects. In the third chapter we evaluated the selectivity of herbicides used in the cultivation of eucalyptus, to the parasitoid, P. elaeisis. The treatments consisted of doses of commercial herbicides sulfentrazone, oxyfluorfen, glyphosate, glufosinate ammonium salt and isoxaflutole, beyond control, with water only. The herbicides were sprayed in pupae of the alternative host T. molitor, which were exposed to six female parasitism by P. elaeisis. The herbicide glufosinate ammonium salt and oxyfluorfen were not selective in females of P. elaeisis, and reduced parasitism and emergence of this parasitoid. The number of individuals and females produced per female were higher with glyphosate and isoxaflutole and can be used in programs of Integrated Pest Management (IPM) in the culture of eucalyptus.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:36Z No. of bitstreams: 5 5.pdf: 1107084 bytes, checksum: ac1ace2c8450a7562b6888830ef6361e (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20626 bytes, checksum: 7851d446050a985bd0603b7c4cee472d (MD5) license_rdf: 19710 bytes, checksum: aa65da15f424ff71c620a992a187295c (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:15:43Z (GMT) No. of bitstreams: 5 5.pdf: 1107084 bytes, checksum: ac1ace2c8450a7562b6888830ef6361e (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20626 bytes, checksum: 7851d446050a985bd0603b7c4cee472d (MD5) license_rdf: 19710 bytes, checksum: aa65da15f424ff71c620a992a187295c (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:15:43Z (GMT). No. of bitstreams: 5 5.pdf: 1107084 bytes, checksum: ac1ace2c8450a7562b6888830ef6361e (MD5) license_url: 49 bytes, checksum: fd26723f8d7edacdb29e3f03465c3b03 (MD5) license_text: 20626 bytes, checksum: 7851d446050a985bd0603b7c4cee472d (MD5) license_rdf: 19710 bytes, checksum: aa65da15f424ff71c620a992a187295c (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2010 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Os impactos provocados pela agricultura convencional t?m promovido degrada??o dos recursos naturais, o que preocupa toda a humanidade. Especificamente nos tr?picos, os solos necessitam de prote??o constante, haja vista que o seu desgaste promove redu??o da produtividade. Nesse sentido, pr?ticas conservacionistas, como aduba??o verde, permitem a manuten??o da capacidade produtiva do solo ao longo do tempo, sem causar impactos negativos ao meio ambiente, conduzindo para a sustentabilidade dos agroecossistemas. O objetivo deste trabalho foi gerar e adaptar conhecimentos e tecnologias que possibilitem ampliar o uso da aduba??o verde em cultivos conservacionistas de baixa perturba??o do solo para a agricultura familiar, no Vale do Jequitinhonha/MG, quando foram objetos deste estudo dois biomas caracter?sticos da regi?o, o Cerrado e a Caatinga. Dois experimentos foram conduzidos: um na regi?o de Cerrado, com leguminosas anuais, mucuna cinza (Mucuna nivea), mucuna preta (Mucuna aterrima), lab-lab (Dolichos lab lab), feij?o-de-porco (Canavalia ensiformis), crotal?ria juncea (Crotalaria juncea), crotal?ria espectabilis (Crotalaria spectabilis), guandu an?o (Cajanus cajan) e testemunha (solo nu), e outro na regi?o da Caatinga Mineira, constitu?do pelas leguminosas perenes: cudzu tropical (Pueraria phaseoloides), calopog?nio (Calopogonium mucunoides), amendoim forrageiro (Arachis pintoi), soja perene (Glycine wightii), estilosante campo grande (Stylosanthes capitata e Stylosanthes macrocephala) e testemunha (solo nu). O delineamento experimental utilizado nos dois experimentos foi o de blocos ao caso com quatro repeti??es. Observou-se que, na regi?o de Cerrado, as leguminosas que se destacaram inicialmente para cobertura do solo foram a mucuna cinza e o feij?o-de-porco, com todas as coberturas promovendo a redu??o da temperatura em rela??o ? testemunha. Para a reten??o de umidade do solo, o destaque foi a mucuna cinza. Dentre as coberturas avaliadas nesse bioma, as que contribu?ram para redu??o da fitomassa das plantas espont?neas foram o guandu an?o, mucuna cinza, feij?o-de-porco e lab-lab, com destaque para redu??o em 40% da fitomassa das gram?neas, proporcionada com essas coberturas. A mucuna cinza, mucuna preta, lab-lab e feij?o-de-porco se destacaram no incremento de macronutrientes e aumento da mat?ria org?nica sobre o solo, com a senesc?ncia de folhas durante o ciclo. A crotal?ria juncea foi a esp?cie que se destacou no ac?mulo de fitomassa, aporte N e macronutrientes. No experimento realizado na regi?o da Caatinga Mineira, as leguminosas que se destacaram para cobertura do solo foram o calopog?nio, amendoim forrageiro e cudzu tropical, com o calopog?nio contribuindo com as maiores taxas nos primeiros 90 dias. O uso das leguminosas como cobertura permanente promoveu mudan?as na composi??o das esp?cies espont?neas ao longo das avalia??es, quando o calopog?nio, amendoim forrageiro e cudzu tropical se destacaram na capacidade de supress?o das espont?neas. Todas as leguminosas a partir dos 120 dias proporcionaram menor temperatura do solo, em rela??o ? testemunha. O calopog?nio se destacou dentre as esp?cies, com maior capacidade em conservar a umidade do solo, no incremento de macronutrientes e aumento da mat?ria org?nica sobre o solo, por meio da senesc?ncia de folhas durante o ciclo, maior ac?mulo de fitomassa, macronutrientes e aporte de N ao sistema, pela parte a?rea, aos 180 dias de ciclo. Este trabalho permite que os agricultores conhe?am o comportamento das diferentes esp?cies para aduba??o verde, as quais apresentam caracter?sticas distintas, para, assim, suprirem as diferentes demandas para os sistemas agr?colas do Vale do Jequitinhonha. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT The impacts caused by conventional agriculture have been promoting degradation of natural resources, what concerns the humankind. Specifically in the tropics, the soils require constant protection, considering that the wastage decreases the productivity. In this sense, conservation practices such as green manuring maintain the productive capacity of the soil over the times without causing negative impacts to the environment, leading to the sustainability of ecosystems. The objective of this study was to generate and adapt knowledge and technology that could wide the use of green manuring in conservation crops with low soil disturbance to the family farm in the Jequitinhonha Valley/Minas Gerais, where there were evaluated two characteristic biomes of the region, Cerrado and Caatinga. Two experiments were conducted: one in the region of Cerrado with annual leguminous, grey mucuna (Mucuna nivea), black (Mucuna aterrima), lab-lab (Dolichos lab lab), feij?o-de-porco (Canavalia ensiformis), juncea crotalaria (Crotalaria juncea), espactabilis crotalaria (Crotalaria spectabilis), Little guandu (Cajanus cajan) and control (bare soil), and another in the Caatinga region consists of the perennial leguminous: tropical cudzu (Pueraria phaseoloides), calopog?nio (Calopogonium mucunoides), forage peanut (Arachis pintoi), perennial soy (Glycine wightii), campo grande estilosante (Stylosanthes capitata and Stylosanthes macrocephala) and control (bare soil). The experimental design used in both experiments was randomized blocks with four replications. It was observed that in the Cerrado region the species that initially stood out for ground cover were grey mucuna and feij?o-de-porco, with all the coverage promoting the reduction of temperature compared to control. In retaining soil humidity it was the grey mucuna. Among the tested coverages in this biome, the ones which contributed to the reduction in weeds phytomass were the little guandu, grey mucuna, feoj?o-de-porco and lab-lab, pointing the reduction of 40% in gramineas phytomass provided with these coverages. The grey mucuna, black mucuna, lab-lab and feij?o-de-porco stood out in the increment of macronutrients and increase of organic matter on the ground with the senescence of leaves during the cycle. The juncea crotalaria was the specie that stood out in the accumulation of phytomass, N and macronutrient intake. In the experiment conducted in the Caatinga Mineira, the species that stood out to cover the soil were Calopog?nio, forage peanut and tropical cudzu, where the Calopog?nio contributed to the highest rates is the first 90 days. The use of leguminous as permanent coverage induced changes in weed species composition along the ratings, when calopog?nio, forage peanut and tropical cudzu stood out in ability to suppress the spontaneous ones. All the leguminous out of 120 days provided less soil temperature, compared to control. The calopog?nio stood out among the species, with greater capacity to conserve soil humidity, the increment of macronutrients and increase of organic matter on the ground, through the senescence of leaves during the cycle, increased accumulation of phytomass, N and macronutrient intake of the system in the airy part in the 180 days of the cycle. This work allows farmers to know the behavior of different species against green manuring, what shows different characteristics making up for the different demands of agricultural systems in the Jequitinhonha Valley.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:36Z No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T19:21:15Z (GMT) No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-27T19:21:15Z (GMT). No. of bitstreams: 5 52.pdf: 535664 bytes, checksum: 9804322a513635d7cf36650e1314a803 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O sucesso na explora??o comercial de ra?zes de cenoura depende da escolha de cultivares com boa adapta??o ?s condi??es ed?ficas e clim?ticas no local onde ser? cultivada e com boa aceita??o pelo mercado consumidor. O objetivo do presente trabalho foi avaliar o desempenho de cultivares de cenoura no cultivo de outono-inverno em dois munic?pios com caracter?sticas edafo-clim?ticas distintas do Alto Vale do Jequitinhonha, MG. Os experimentos foram conduzidos na Fazenda Rio Manso, munic?pio de Couto de Magalh?es de Minas, MG e no Campus JK, munic?pio de Diamantina, MG. Foram avaliadas seis cultivares de cenoura (Bras?lia, Nantes, Kuronan, Esplanada, Planalto e Tornado) num delineamento experimental em blocos ao acaso com tr?s repeti??es. Para a evolu??o do crescimento, a partir do dia do desbaste (35 dias ap?s semeadura), at? o dia da colheita (100 dias ap?s semeadura), foram avaliadas semanalmente as seguintes caracter?sticas: altura da parte a?rea, comprimento de raiz, massa seca de raiz, massa seca total, ?ndice de colheita e produtividade total. Estas mesmas caracter?sticas, acrescidas da produ??o comercial, foram consideradas para representarem a produ??o final. As cultivares que se destacaram foram Planalto, Tornado e Kuronan em Couto de Magalh?es de Minas e Planalto em Diamantina. O desempenho agron?mico das cultivares foi superior em Couto de Magalh?es de Minas para a maioria das vari?veis avaliadas, resultando em uma maior produtividade total e comercial de ra?zes. As condi??es edafo-clim?ticas de Diamantina provocam indu??o de florescimento na maioria das cultivares, causando perdas de produtividade comercial no cultivo de outono-inverno. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT Growing and trading carrots depends upon choosing cultivars with good adaptability on the region where they grow and good acceptance by the consumers. This work aimed to evaluate the performance of autumn-winter carrot cultivars growing in two diverse regions on Jequitinhonha Valley: Fazenda Rio Manso ? UFVJM, in Couto de Magalh?es de Minas and Campus II ? UFVJM, in Diamantina. Six cultivars (Bras?lia, Nantes, Kuronan, Esplanada, Planalto e Tornado) were evaluated in a randomized block design with three replications. The evaluations were carried out weekly from 35th up to 100th day after sowing, on the traits: plant height; root length; weight of dry roots; total dry weight; harvest index; and total yielding. These traits, plus the commercial weight, were evaluated after harvest (at the 100th day). The cultivars Planalto, Tornado and Kuronan had the best performance In Couto de Magalh?es while in Diamantina only Planalto exceeded. Couto de Magalh?es showed better performance than Diamantina for any cultivar in almost all evaluated traits. Early flowering on most of the cultivars in Diamantina resulted in a significant loss of commercial weight, supposedly as a consequence of its low temperature.