Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 83-87).

No description available.

Thesis (M.S.)--California Polytechnic State University, 2009. / Mode of access: Internet. Title from PDF title page, viewed on March 30, 2009. Major professor: Michael J. Costello, Ph.D. "Presented to the Electrical Engineering Department Faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Agriculture, with specialization in Plant Protection Science." March 2009." Includes bibliographical references (p. 48-54). Will also be available on microfiche.

Orientador: Raphael de Campos Castilho / Banca: Letícia Henrique de Azevedo / Banca: Gilberto José de Moraes / Resumo: No Brasil, os estudos que visam avaliar a diversidade e abundância de ácaros edáficos predadores, como os Gamasina (Mesostigmata), ainda são incipientes, focando principalmente em áreas de vegetação natural. No entanto, compreender o impacto da agricultura nestes organismos é importante no aspecto de preservar a biodiversidade e avaliar a sensibilidade destes indíviduos aos tratos culturais. Além disso, conhecer a diversidade desses ácaros edáficos é o primeiro passo na prospecção de novos agentes de controle biológico. Dessa forma, o objetivo dessa dissertação foi determinar e comparar a diversidade e abundância de espécies de ácaros edáficos presentes em um fragmento de Mata Atlântica e em três cultivos agrícolas, em Jaboticabal, estado de São Paulo, com ênfase nos Gamasina. As coletas de solo e serrapilheira (quando presente) foram realizadas bimenstralmente, entre os meses de agosto de 2015 a junho de 2017. Foram avaliadas quatro áreas: um fragmento de Mata Atlântica e cultivos de milho, soja e mangueiras. Cada coleta consistiu em 10 pontos amostrais aleatórios. No laboratório, as amostras foram colocadas em equipamento do tipo Funil de Berlese-Tullgren modificado para extração dos ácaros. O material extraído foi triado, os ácaros foram separados por ordem, sendo os Gamasina montados em lâminas de microscopia. Em seguida, os Gamasina foram identificados, sempre que possível, até o nível de espécie. Os resultados deste estudo demonstraram que o grupo de ácaros edáficos mai... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In Brazil, studies aimed to evaluate the diversity and abundance of edaphic predatory mites, such as the Gamasina (Mesostigmata), are still incipient, focusing mainly on areas of natural vegetation. However, understanding the impact of agriculture on these organisms is important in terms of preserving biodiversity and assessing the sensitivity of these individuals to agricultural managements. In addition, knowing the diversity of these soil mites is the first step in prospecting for new biological control agents. Thus, the objective of this study was to determine and compare the diversity and abundance of edaphic mite species present in a fragment of Atlantic Forest and three agricultural crops, in Jaboticabal, state of São Paulo, with an emphasis on Gamasina. Soil and litter (when present) were collected bi-monthly, between August 2015 and June 2017. Four areas were evaluated: a fragment of Atlantic Forest, corn, soybean and mango crops. Each sample consisted on ten random sampling points. In the laboratory, the samples were placed in a modified Berlese-Tullgren funnel for the extraction of mites. The extracted material was screened and the mites were separated in order, the Gamasina being mounted on microscopic slides. Then were identified, when possible, to species level. The results of this study showed that Oribatida (Sarcoptiforme) was the most abundant mite collected, representing 73.5% of total miltes, for the four areas. Gamasina were the second most abundant group (... (Complete abstract click electronic access below) / Mestre

Orientador: Daniel Junior de Andrade / Banca: Marcos Doniseti Michelotto / Banca: Ricardo Antonio Polanczyk / Resumo: O cultivo do amendoim está sujeito a vários estresses por fatores seja de natureza biótica ou abiótica. Entre os fatores bióticos que afetam o desenvolvimento das plantas, destacam-se a ocorrência de pragas e doenças que limitam a produtividade da cultura. O ácaro Tetranychus ogmophallos é uma praga emergente que vêm causando prejuízos aos produtores de amendoim nas safras de 2008/09 até 2017/18. Até a realização desta pesquisa pouco se sabia sobre o potencial e capacidade de dispersão desta espécie de ácaro. Compreender os mecanismos de dispersão de um organismo praga é fundamental para estabelecimento de estratégias de controle. Portanto, o objetivo principal dos trabalhos foi estudar os mecanismos de dispersão de T. ogmophallos na cultura do amendoim. Os experimentos foram conduzidos no Laboratório de Acarologia do Departamento de Fitossanidade da Universidade Estadual Paulista - Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal (UNESP/FCAV). Para avaliar a dispersão de T. ogmophallos pelo vento foram realizados dois experimentos com níveis de infestação diferentes, 500 e 1.000 indivíduos por planta. A dispersão foi avaliada submetendo-se os ácaros a velocidades de vento (vv) de 5, 10, 15, 20, 25 e 30 km.h-1. O número de ácaros capturados foi avaliado para cálculo da distância média de deslocamento e a porcentagem de ácaros deslocados. A porcentagem de ácaros deslocados (AD%) foi estimada em função de vv a partir de quatro modelos não lineares. Os resultados ind... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Peanut crop is subject to several stresses by factors of a biotic or abiotic nature. Among the biotic factors that affect the development of plants, we highlight the occurrence of pests and diseases that limit the productivity of the crop. The mite Tetranychus ogmophallos is an emerging pest that has been causing losses to peanut farmers in the 2008/09 crop season until 2017/18. Until the realization of this research little was known about the potential and dispersion capacity of this species of mite. Understanding the mechanisms of dispersion of a pest organism is critical for the establishment of control strategies. Therefore, the main objective of the work was to study the mechanisms of dispersion of T. ogmophallos in the peanut crop. The experiments were conducted at the Laboratory of Acarology of the Department of Plant Protection of the São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal. To evaluate the dispersion of T. ogmophallos by wind two experiments were carried out with different infestation levels, 500 and 1,000 individuals per plant. The dispersion was evaluated by subjecting the mites at wind speeds (ws) of 5, 10, 15, 20, 25 and 30 km.h-1. The number of mites captured was evaluated for the calculation of mean displacement distance and the percentage of displaced mites. The percentage of displaced mites (AD%) was estimated as a function of ws from four non-linear models. The results indicated that AD% depends on ws... (Complete abstract click electronic access below) / Mestre

Temperature effects on the biology of Tetranychus cinnabarinus (Boisduval) and Typhlodromus occidentalis (Nesbitt) (Acarina: Phytoseiidae) were studied in the laboratory. Temperature had a definite effect on the developmental time, longevity and survival of adult females, and duration and rate of oviposition in both T. occidentalis and T. cinnabarinus. Increases in temperature significantly decrease developmental time, pre-oviposition periods, oviposition duration and rate, and the longevity and survival rates of both adult females. However, the daily consumption rate of T. occidentalis protonymph, deutonymph and adult gravid female increased significantly with an increase in temperature. Mean generation times decreased for both mites with an increase in temperature. The intrinsic rate of natural increase rose with each temperature increase. However, the r(m) of T. occidentalis was less than that for T. cinnabarinus at all temperature regimes, and it decreased from the 26.6° C regime to the 30.5° C regime. Of the three temperatures studied, 22.7°, 26.6°, and 3.5° C, 22.7° C proved to be the optimum for the predator to maintain control over the prey.

A comprehensive evaluation of the effects of an nC24 agricultural mineral oil (AMO) on tritrophic interactions between French bean Phaseolus vulgaris cv. Redlands Pioneer [Fabales : Fabaceae ], two spotted mite (TSM) Tetranychus urticea Koch [Acari: Tetranychidea] and the predatory mite Phytoseiulus persimilus Atheus-Henriot [Acari: Phytoseiidae] was conducted under laboratory conditions. / Doctor of Philosophy (PhD)

Spine title: Interactions between plants and mites / Includes journal article by the author / Bibliography: leaves [1]-[9] / viii, 98, [110] leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, 1988

Bibliography : leaves 150-158. / viii, 158 leaves, [7] leaves of plates : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Crop Protection, 1996?

Made available in DSpace on 2015-06-17T19:33:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-24. Added 1 bitstream(s) on 2015-06-18T12:48:21Z : No. of bitstreams: 1 000829353.pdf: 564915 bytes, checksum: a94751c8114e00f7a3ab45702fb65958 (MD5) / Nas últimas safras, constatou-se aumento significativo na incidência de ácaros-praga nos campos de produção de amendoim. Altas infestações de ácaros comprometem o desenvolvimento e a produtividade da cultura, elevam os custos de produção e ainda podem contribuir para aumento do impacto negativo sobre o meio ambiente. Sabe-se que os principais ácaros-praga que vêm causando prejuízos aos produtores em São Paulo pertencem à família Tetranychidae. Portanto, os objetivos do trabalho foram estudar a distribuição espacial do ácaro Tetranychus ogmophallos Ferreira e Flechtmann (Acari: Tetranychidae) e determinar a depreciação quantitativa e qualitativa causada por esse ácaro à cultura do amendoim. Os experimentos foram realizados a campo e em casa de vegetação. Para realização dos experimentos a campo foram selecionadas duas áreas de amendoim, sendo uma área localizada na Faculdade de Ciências Agrárias e Veterinárias - UNESP/FCAV e outra na zona rural do município de Jaboticabal-SP, Brasil. Nas áreas selecionadas, foram vistoriados materiais vegetais compostos por folhas, folíolos e pecíolos, coletados na parte inferior e superior de plantas distanciadas de 22,5 metros uma das outras. A primeira coleta foi realizada 28 dias após o plantio, e as demais a cada quinze dias. Em contrapartida, foram realizados em casa de vegetação da UNESP/FCAV quatro experimentos para determinar a depreciação quantitativa e qualitativa causada pelo ácaro T. ogmophallos ao amendoinzeiro. Estes experimentos foram instalados em delineamento inteiramente casualizado, compostos por dois tratamentos com vinte repetições cada. Os tratamentos empregados foram plantas infestadas e não infestadas pelo ácaro. Em cada experimento variou-se a época de infestação com o ácaro (15, 30, 60 e 90 dias após a emergência das plântulas). Em cada infestação transferiram-se aproximadamente 3.000 ácaros. Os dados foram submetidos à ... / In recent growing seasons, there was a significant increase in the incidence of mite in peanut fields. Large infestations of pest mites affect the development and crop productivity, increases production costs, and contribute to increased environmental contamination due to intensive use of pesticides to control these arthropod. Field Information and observations indicate that the main pest mites that have caused damage to producers in São Paulo belong to Tetranychidae. This work aimed to study the type of spatial distribution of Tetranychus ogmophallos Ferreira e Flechtmann (Acari: Tetranychidae) mite on peanut, which probability distribution model that best represents your behavior in the field, as well as, determine the quantitative and qualitative depreciation caused by the mite to peanut crop. The experiments were carried out in the field and in a greenhouse belonging to the Faculty of Agricultural and Veterinary Sciences - UNESP/FCAV, Jaboticabal - SP. To determine the spatial distribution of the mite on peanut two fields with peanut were selected. In selected fields were examined plant materials consisting of leaves, leaflets and petioles, collected in the lower and top of the plant. The plants were spaced 22.5 m from one another. The first collect of samples of plant material was performed twenties days after planting, and the other every fifteen days. To determine the quantitative and qualitative depreciation experiments were conducted in a greenhouse, arranged in a completely randomized design consisting of two treatments, plants infested and non-infested (control), with 20 repetitions. The age of infestation varied in each experiment based on the number of days (15, 30, 60, and 90) after seedling emergence. Approximately 3,000 mites were transferred for each infestation. Data were submitted to analysis of variance, and means were compared by F test at 5% probability and the aggregation indexes were used to study the ...