EFEITO DO INDUTOR DE RESISTÊNCIA DE Saccharomyces cerevisiae EM ASSOCIAÇÃO COM FUNGICIDAS NO CONTROLE DA FERRUGEM-ASIÁTICA DA SOJA

Abstract

The current productive system is based on the use of classic inputs, although there is an emergence of innovative tools in the market to integrate disease management and ensure the sustainability of modern agriculture. The objective of this work was to evaluate the effect of the resistance inducer based on cerevisane applied in association with fungicides on the control of Asian soybean rust and the increase in productivity. The experiment was conducted at the agricultural research center in Primavera do Leste-MT between December 2022 and April 2023. Three applications (A, B, C) were performed, and the treatments consisted of fungicide management, fungicides alternating the timing of cerevisane application, and the untreated plot. The plots were subjected to assessments of severity, AACPD, infection rate, phytotoxicity, defoliation, efficacy, and productivity. The disease emerged in the field 66 days after planting (DAP), and from then on, given the pathogen's severity, it showed significant progression in the control plots. At the 87 DAP assessment, the use of cerevisane in application C showed greater severity among the treatments, and at 101 DAP the situation remained similar. The applied products did not cause phytotoxicity. Regarding defoliation assessment, the treatments that best maintained canopy were the fungicide management and the fungicide management with cerevisane in applications A and AB. The efficacy of the treatments in R5 pointed to better performance for the treatment with fungicide and cerevisane applied in A and B. The productivity of the experiment was higher for the treatments that received fungicides and fungicides with cerevisane. The data obtained allowed the conclusion that the disease severity showed the pathogen's potential for damage under high pressure conditions. The performance of cerevisane added to the standard fungicide management did not show a significant increase in control but helped in delaying the disease's development. The productivities obtained in the treatments with fungicide alone as well as with cerevisane indicate an increase in production with the use of integrated management between fungicide and resistance inducer.