ÉPOCAS DE APLICAÇÃO DE BENZIMIDAZOL NO MANEJO DE Stenocarpella spp. EM GRÃOS DE MILHO

Abstract

Brazil is the second largest corn producer on the planet, and this crop is fundamental to the country's GDP. One of the main problems of the crop is the high percentage of burnt grains presented by many hybrids, which reflect in loss of quality and weight of the grains. The pathogens associated with white rot of the ear of corn are Stenocarpella spp. In susceptible corn hybrids, they cause stalk and ear rot, as well as leaf lesions that can serve as inoculum sources for subsequent infections at the base of the ears, affecting grain productivity and health. This work measures the contribution of foliar application of the benzimidazole methyl thiophanate, associated with a fungicide composed of triazole and strobilurin, in reducing the rates of diseased grains and increasing productivity in second season corn. The fungicides treatments differed from the control in most analyzes, justifying their investments. However, in the Tukey test (p ≤ 0.05) there were no differences between them in most analyzes. Despite this, comparing the numerical differences to their prices, the 5 treatments can offer, in different proportions, technical and commercial benefits to agribusiness.