Desenvolvimento e produtividade da cultura do milho submetida a combinações de fungicidas, inseticidas, bioestimulantes e fertilizantes foliares

Abstract

The obtaining of high productivity indexes of the corn crop is directly linked to the maintenance of the integrity of the plant consequently and thus promoting its development. Therefore, the objective of this work was to evaluate the development and productivity of corn crop submitted to insecticide, biostimulant and foliar fertilizer combinations and with different numbers of fungicide applications. The experiment was conducted in Uberlândia - MG, during the second harvest of 2017. The experimental design was performed in a randomized complete block design in a 4x2 factorial scheme, with 16 replicates. The first factor corresponded to four different combinations of insecticides, biostimulants and foliar fertilizers. The second factor corresponded to the number of applications of the combination of fungicides [(azoxystrobin + cyproconazole) + diphenoconazole + mancozeb)]. Plant height, stem insertion height, stalk diameter, and grain yield were evaluated. Under the conditions under which this assay was conducted, treatment with [thiamethoxam + lambda-cyhalothrin] + leaf fertilizer + biostimulant obtained the best results for plant height and height of the spike insertion, and for productivity (together with combination treatment of cyanthraniliprole + [thiamethoxam + lambda-cyhalothrin]). Regarding the applications of fungicide, with two applications, it observed better results for productivity, plant height and height of spike insertion, compared when applied only once.