Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:16:40Z No. of bitstreams: 2 maxwel_coura_oliveira.pdf: 605412 bytes, checksum: 1369fcb1c80b354f7dcdd92c22226e14 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:17:10Z (GMT) No. of bitstreams: 2 maxwel_coura_oliveira.pdf: 605412 bytes, checksum: 1369fcb1c80b354f7dcdd92c22226e14 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T13:17:27Z (GMT) No. of bitstreams: 2 maxwel_coura_oliveira.pdf: 605412 bytes, checksum: 1369fcb1c80b354f7dcdd92c22226e14 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-23T13:17:27Z (GMT). No. of bitstreams: 2 maxwel_coura_oliveira.pdf: 605412 bytes, checksum: 1369fcb1c80b354f7dcdd92c22226e14 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / 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) / Dentre os fatores que contribuem para a baixa produtividade m?dia do milho no Brasil, destaca-se a interfer?ncia das plantas daninhas, que afetam diretamente a produtividade, podendo chegar a perdas de at? 90% da produ??o, caso nenhum m?todo de manejo for adotado. Na tentativa de simplificar o manejo e reduzir os custos de controle das plantas daninhas foi lan?ado o milho resistente ao herbicida glyphosate, tecnologia que tem se mostrado bem aceita pelos agricultores. Contudo, o uso excessivo e frequente do glyphosate em ?reas de cultivo tem selecionado esp?cies de plantas daninhas resistentes e tolerantes a esse herbicida, dificultado o controle. Objetivou-se com os estudos avaliar a interfer?ncia de plantas daninhas tolerantes ao glyphosate no milho RR, bem como o efeito de diferentes formula??es comerciais de glyphosate sobre a cultura. Os trabalhos foram realizados em ambiente protegido com o h?brido AG8088 YGRR. No primeiro experimento foram testadas a influ?ncia de formula??es de glyphosate sobre o crescimento do h?brido de milho AG8088 YGRR. No segundo experimento, avaliou-se a habilidade competitiva entre milho e as plantas daninhas Commelina beghalensis L. e Richardia brasiliensis Gomes, tolerantes ao glyphosate. O milho demonstrou menor habilidade competitiva quando cultivado na presen?a de C. benghalensis em rela??o quando foi cultivado com R. brasiliensis. A aplica??o de glyphosate se mostrou eficiente no controle de R. brasiliensis. H? evid?ncias formula??es de glyphosate alteram o teor e conte?do foliar de macronutrientes e vari?veis morfol?gicas do milho RR. / 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 factors that contribute to low average productivity of corn in Brazil, it is competition with weeds, which directly affect productivity, reaching losses up to 90% of production. In an attempt to simplify the management and reduce the costs of weed control was released glyphosate resistant corn, technology that has been well accepted by farmers. However, the over use of glyphosate in cultivation areas have selected weeds species resistant and tolerant to this herbicide, making it difficult to control. The aim of this study was to evaluate the interference of glyphosate tolerant weeds in Glyphosate Resistant Corn as well as the effect of commercial formulations of glyphosate over the. The studies were conducted in the greenhouse with the hybrid AG8088 YGRR. In the first experiment evaluated different formulations of glyphosate on the growth of hybrid. The second experiment the competitive ability between corn and weeds Commelina beghalensis and Richardia brasiliensis. Corn has showed lower competitive ability when grown with C. benghalensis than R. brasiliensis. The application of all glyphosate formulations was effective to control the weed R. brasiliensis. There are evidences that the application of glyphosate formulations alter the percentage, and content of nutrients, also the morphological characteristics of corn.