Evaluation of Indigenous Technical Knowledge (ITK) against Rice Leaf Folder, Cnaphalocrosis medinalis (Guen.) at Southern Parts of Chhattisgarh, India

Among various factors responsible for low yield, losses due to insect-pests attack are of prime importance. Paddy crop is attacked by more than hundred insect species, of which fifteen are of major economic importance. Among these insect-pests, leaf folder, Cnaphalocrosis medinalis Guen is noticed as regular insect-pest at baster plateau zone. Present studies on evaluation of efficacy of indigenous technology against leaf folder. The results revealed that significantly least infestation (3.16%) with the highest grain yield, gross return and CB ratio of 38.32 q/ha, Rs. 50,199.20 and 2.39, respectively recorded in standard check chemical i.e. chlorpyriphos 20 EC. Among the ITK components, Neem had least leaf infestation (9.52%) with highest grain yield (31.52 q/ha), maximum gross return (Rs. 41,291.20) and maximum CB ratio (2.05).