ABSTRACT
The major fungal diseases affecting the rice crop in southern Brazil are blast and brown spot, responsible for significant yield and grain quality losses. With the aim of providing chemical control alternatives for these diseases, ten fungicide treatments were evaluated during three crop seasons through spraying in R2 (booting) and R4 (flowering) stages. For brown spot control, cyproconazole + picoxystrobin, epoxiconazole + kresoxim-methyl, tebuconazole + trifloxystrobin, and tricyclazole + tebuconazole were the most consistent treatments over the three evaluated years. For rice blast control, the mixture tricyclazole + tebuconazole, as well as tricyclazole alone, resulted in the lowest disease incidence and in statistically superior grain yield, compared to the remaining treatments. Tricyclazole + tebuconazole best combined efficient control of both diseases and grain yield.
Keywords
Fungicides;
Pyricularia oryzae
;
Bipolaris oryzae
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