Seasonality of Nomuraea rileyi (farlow) samson in northern trasitional belt of karnataka

Investigation on seasonal occurrence of Nomuraea rileyi in relation to time and crop ecosystem revealed that activity of fungus commenced from II fortnight of July, reached peak during September II fortnight and declined gradually before disappearing totally from December to next year. The period between August II fortnight to October I fortnight was most ideal for its epizootic as the extent of mycosis crossed 40% at both the locations. The average disease severity in the season was higher at Bailhongal (22.8%) than at Dharwad (11.4%). Groundnut and soybean ecosystems provided most conducive microclimate for disease incidence on Spodoptera litura, Thisnoplusia orichalcea and Helicoverpa armigera.