Biological effectiveness of fungicides Rango, Tacora, Velficur and Opus for control of Karnal Bunt

Commercial fungicides Rango, Tacora, Velficur, and Opus were evaluated in the field, to determine their biological effectiveness control karnal bunt (Tilletia indica) of wheat. A completely randomized design was used with four replications. Twenty heads cultivar Tacupeto F2001 inoculated during boot stage an allantoid sporidial suspension (10,000/mL). rates indicated containers each product followed. The first application carried out ten days after inoculation (Zadoks stages 56-58), second one later. Inoculated spikes threshed by hand healthy infected kernels counted percentage infection. Two hundred grains per treatment replication weighed. products 91.6, Velficur 83.2, Tacora 80.2, Rango 70.3%. untreated check had a mean 18.6% There no statistical differences for level infection arcsin transformation (Tukey, p = 0.05) coefficient variation 16.2%. average weight 200 10.6, 10.5, 10.7 g, respectively, g check. No phytotoxic effects treatments applied wheat plant observed.