Dessecação de coberturas de inverno e os efeitos sobre a produção de milho

Abstract

Weed control is the basis for the productive success of crops. The desiccation of the cover plants is necessary to avoid their competition with the crops of interest. The objective of this study was to evaluate the efficacy of products used as desiccants of winter coverages, black oats and turnips, and the effect on yield components of corn. The experimental design was a randomized block design, with 11 treatments and four replications. The products tested were: fermented cabbage + salt, ammonium glufosinate, glyphosate, paraquat, fermented cabbage + mineral oil, fermented cabbage + vegetable oil, fermented cabbage + glyphosate, and control without application. The control caused by the products to black oats and turnip was evaluated at 07, 14 and 21 days after application of the treatments (DAT). The yield components of the hybrid SYN 7205 TLTG VIPTERA were also determined in the maize harvest. Glyphosate was the product that provided greater control of black oat and turnip at 14 and 21 DAT. The treatments involving glyphosate, fermented cabbage + glyphosate, ammonium glufosinate and paraquat showed control of black oats and turnip, which favored the corn to express better production of grain yield components. The use of glyphosate as a desiccant demonstrated the highest productivity of corn grains. The treatments with cabbage fermented did not show control of the cover vegetation in all evaluated periods, only fermented cabbage + glyphosate.