INTERVALOS DE APLICAÇÃO DE FUNGICIDAS APÓS O ESTABELECIMENTO DA FERRUGEM ASIÁTICA NA SOJA

Abstract

In this study, we analyzed the best intervals of days to enter with a new application of chemical fungicides when there was an Asian rust epidemic in soybeans, that is, when the pathogen is already installed in the area and there has been no management preventative, and what would be the best way to manage it so that its spores do not spread further preventing new infections. 5 variables were evaluated, namely: Severity, PMG, Defoliation, Productivity, AACPD. The experiment was conducted at the Innovation and Technology – CIT GAPES, in the city of Rio Verde- GO, during the 2022/2023 harvest period. They were 4 treatments and 1 control were conducted, all treatments received the first three applications equally and at the same time, but the next applications They differentiated the entry time varying between 9,12,15,18 days apart from each other. In order to discover which treatment would be most effective for rust control Asian. The results obtained demonstrated that treatments with intervals of application between 9 and 12 days were the most effective, that is, when applications were shortened of fungicides, there was a greater response curve to rust control.