Efeito do volume de calda na pulverização de fungicida em soja.

Abstract

The aim of this work was to evaluate the spray volume effect on the soybean fungicide application for rust control. Three spray volumes were evaluated (90, 115 and 160 L ha-1) in the fungicide application. Hydraulic standard flat fan spray nozzles were used. Beside this, an additional treatment was evaluated without the fungicide application (non-treated plot). Emgopa 313 soybean (long cycle) were sown. After the application of the fungicide tebuconazole, with the different volume rates, the rust severity and the yield were evaluated. The results showed that, with favorable climatic conditions to pesticide application, the increase of the spray volume (90 to 160 L ha-1) did not influence the rust severity and the soybean yield in the treated plots.