AERIAL AND GROUND APPLICATION OF FUNGICIDE IN CORN SECOND CROP ON DISEASES CONTROL

摘要

The aim was to evaluate the diseases severity on corn second crop. The research was conducted on the agricultural year of 2013 and 2014, evaluating the application quality over the fungicide spraying. The hybrid used was PIONEER 30k75 BT HERCULEX, evaluating the diseases severity previously and after the fungicide spraying, spray deposition on the culture and productivity. The aerial application was carried out with solution volume of 7.5, 13.5, 20 and 30.3 L ha -1 , using automatic rotating nozzles, and the ground application with 90, 110, 130 and 150 L ha -1 , uniform flat spray tips. As control a non-fungicide treatment was used. The aerial and soil treatment showed diseases control from the corn crop, being the biggest cover of drops acquired at the volumes 30.30 L ha -1 for aerial and 150 L ha -1 for soil, with no significant change on the productivity of the corn harvest for both forms of spraying: aerial or soil.