Potencial de fertilizantes foliares aplicados de forma isolada e em associação com fungicidas sobre o comportamento de doenças e a produtividade da cultura da soja

Abstract

The present work had the objective of evaluating the potential of foliar fertilizers applied in isolation and in association with fungicides on disease behavior and soybean crop productivity. The trial was conducted in the field in the municipality of Santa Izabel do Oeste/PR in the 16/17 harvest. The cultivar used the planting was carried out on October 27, 2016. The experimental design was a randomized block design, with four replications. Leaf fertilizers were (0.6% Co, 2.5% Mo), phosphite Cu (4% Cu, 2% B, 24% Phosphite), phosphite Mn and Mo (9% Mn, 2.5% Mo , 24% Phosphite) and phosphite K (40% P2O5, 10% K2O, 25% Phosphite). Evaluations of diseases (powdery mildew, mildew, rust and end-of-cycle diseases), initial and final population of plants / pre-harvest, number of pods per plant, weight of 1,000 grains, yield, moisture and defoliation were performed. The results showed that there were no differences in relation to the parameters evaluated in the soybean crop with the association of foliar fertilizers with fungicides. It is believed that this happened due to the environmental conditions that occurred during the crop cycle in the 16/17 crop, which resulted in a lower incidence of diseases and consequently less damage caused by soybean crops.