SELEÇÃO DE FUNGICIDAS PARA CONTROLE DE FERRUGEM ASIÁTICA NA CULTURA DA SOJA

Abstract

One of the main difficulties that limit the productive potential of the soybean crop is the diseases usually caused by fungi. This work aimed to evaluate the efficiency of 19 active ingredients in the chemical control of Asian Soybean Rust (Phakopsora pachyrhizi). The experiment was conducted at the GAPES Innovation and Technology Center (CIT GAPES), located in the city of Rio Verde - GO during the 2018/19 harvest. A randomized block design was used, with four replications. 17 treatments were evaluated, in which a standard application was performed in the first and second application for all treatments (except control), with Ativum for the first application in V8, with an interval of 14 days Elatus + Score for the second application and 14 days after the second, the third was varied using the following fungicides: Aproach Prima, Unizeb Gold, Fusion + Approve, Sphere Max, Orkestra, Score + Unizeb Gold, Unizeb Glory, Cypress, Triziman, Cronnos, Fezan Gold, Cypress + Bravonil 720 , Carbomax, Rivax, Versatilis + Status. For the evaluation, 10 leaves were collected at random from the central planting lines to assess the severity of rust in the lower and middle thirds from the first application followed every 7 days. The treatments with the best productivity were: 12 - Cronnos (54.22 sc.ha-1), 11 - Triziman (52.75 sc.ha-1), 5 - Fusion + Approve (51.60 sc.ha-1 ) and 3 - Aproach Prima (50.75 sc.ha-1).