FORMULAÇÕES DE GLUFOSINATE NA DESSECAÇÃO PRÉ-COLHEITA DA SOJA

Considering the effectiveness of glufosinate in the pre-harvest desiccation of soybeans, but with little comparative information between the formulations of this herbicide, the objective of this study was to evaluate commercial products based on glufosinate in the pre-harvest desiccation of soybeans. The experiment was carried out in Palotina, Paraná state (PR), Brazil, 2020-2021 crop season. A randomized block design with four replications was used. The treatments were composed by the application, in the pre-harvest soybean desiccation, of the glufosinate formulations (400 g ai ha-1): Finale®, Gamonium®, Off Road®, Patrol® SL, Fascinate® BR, Trunfo®, in addition to of the control without application. The percentage of defoliation and maturation (focused on the evaluation of pods), grain moisture and yield were evaluated. No differences were observed between the glufosinate formulations in the defoliation and maturation of the pods of soybean plants, in the application in pre-harvest desiccation. However, further studies are needed so that any differences in performance between glufosinate formulations can be better characterized. None of the glufosinate formulations differed from the control without application in yield, and all reduced grain moisture without differences between them. This indicates the feasibility of applying glufosinate in R7.2, as a pre-harvest desiccation management of soybeans.Haja vista a eficácia do glufosinate na dessecação pré-colheita da soja, mas com poucas informações comparativas entre as formulações deste herbicida, objetivou-se com este estudo avaliar produtos comerciais à base de glufosinate na dessecação pré-colheita da soja. O experimento foi conduzido no campo em Palotina, estado do Paraná (PR), Brasil, safra 2020-2021. Foi utilizado delineamento em blocos casualizados, com quatro repetições. Os tratamentos foram compostos pela aplicação, na dessecação pré-colheita da soja, das formulações de glufosinate (400 g i.a. ha-1): Finale®, Gamonium®, Off Road®, Patrol® SL, Fascinate® BR, Trunfo®, além da testemunha sem aplicação. Foi avaliado o percentual de desfolha e maturação (focada na avaliação das vagens) da soja aos 3, 5 e 7 dias após a aplicação, umidade de grãos e produtividade. Não foram observadas diferenças entre as formulações de glufosinate na desfolha e maturação das vagens das plantas de soja, na aplicação em dessecação pré-colheita. Além disso, nenhuma das formulações de glufosinate diferiu da testemunha sem aplicação em produtividade, e todas reduziram a umidade dos grãos sem diferenças entre elas. Isso, indica a viabilidade da aplicação de glufosinate em R7.2, como manejo em dessecação pré-colheita da soja. Palavras-chave: desfolha; maturação; produtividade; herbicida; dessecante.   Glufosinate formulations in soybean pre-harvest desiccation   ABSTRACT: Considering the effectiveness of glufosinate in the pre-harvest desiccation of soybeans, but with little comparative information between the formulations of this herbicide, the objective of this study was to evaluate commercial products based on glufosinate in the pre-harvest desiccation of soybeans. The experiment was carried out at field in Palotina, Paraná state (PR), Brazil, 2020-2021 crop season. A randomized block design with four replications was used. The treatments were composed by the application, in the pre-harvest soybean desiccation, of the glufosinate formulations (400 g ai ha-1): Finale®, Gamonium®, Off Road®, Patrol® SL, Fascinate® BR, Trunfo®, in addition to of the control without application. The percentage of defoliation and maturation (focused on the evaluation of pods) of soybean at 3, 5 and 7 days after application, grain moisture and yield were evaluated. No differences were observed between the glufosinate formulations in the defoliation and maturation of the pods of soybean plants, in the application in pre-harvest desiccation. Furthermore, none of the glufosinate formulations differed from the control without application in yield, and all reduced grain moisture without differences between them. This indicates the feasibility of applying glufosinate in R7.2, as a pre-harvest desiccation management of soybeans. Keywords: defoliation; maturation; yield; herbicide; desiccant