Effective Fungicides and Optimum Application Time for Peanut Scab Control

Fungicides effective for peanut scab disease control were evaluated, and their optimum application time determined.Thirteen fungicides were tested in the field.They all showed varied degrees of efficacy.Among them, 60% pyraclostrobin, 70% thiophanate-methyl, 10% difenoconazole, and benzoic propiconazole performed better than the others, with significantly improved crop yields as a result.For demonstration, the effects of time and frequency of spraying Armure on the plants were evaluated.The result showed that the best application time was before the pathogenesis appeared.Once the disease was detected, spraying twice consecutively was better than a single application.It was also recommended that these agents to be applied alternatively to reduce possibility of drug-resistance by the pathogen.