Survey for the severity of powdery mildew of mulberry in northern Karnataka

Abstract

A fixed plot survey on severity of powdery mildew of mulberry was conducted in Bagalkot, Belagavi, Chitradurga,Dharwad, Gadag, Haveri, Vijayapura and Ramanagara districts of Karnataka during late kharif 2019-20. The results ofsurvey revealed that, the disease severity varied across the locations surveyed.The maximum mean per cent disease indexwas recorded in Ramanagara district (42.77 PDI) followed by Dharwad district (40.20 PDI) and minimum mean per centdisease index was recorded in Chitradurga district (30.72 PDI) followed by Gadag district (31.72 PDI).Among the surveyedplaces the highest per cent disease index was noticed in Chikkamalligwad village (67.45 PDI) of Dharwad district followedby Ramanagara (66.32 PDI). Whereas, the lowest per cent disease index was noticed in J. N. Kote village (12.43 PDI) ofChitradurga district. The data from the survey revealed that, the disease severity was more in black soil (36.59 PDI)compare to red soil (35.78 PDI). The disease severity was more in rainfed (38.51 PDI) compare to irrigated (32.90 PDI)condition. Among the different varieties cultivated in the farmer's field V-1, S-34, Sahana, M-5, and DH had more per centdisease index compare to other varieties viz., Mysore Local, G-2 and DD. The maximum disease severity (43.91 PDI) wasnoticed in fields at 50-60 Days After Pruning (DAP).