Responses of soybean cuItivars to herbicides

Abstract

An experiment was conducted in Passo Fundo, RS, on a Red Oxissol distrofic soi!, during the 1999/2000 soybean growing season to evaluate cultivar differences in response to herbicides applied alone and as tank mixtures. Height reductions were observed in cultivars BRS 153 and BRS 138. The cultivar BRS 153 exhibited height reductions to diclosulan applied at the rate of 70 g/ha while the cultivar BRS 138 exhibited height reductions to sulfentrazone at 1200 g/ha, diclosulan at 70 g/ha, sulfentrazone+diclosulan at 250+25 g/ha and sulfentrazone+clomazone at 1000+ 1440 g/ha. There was no effect ofthe treatmens on the other evaluated soybean parameters, including yield.