Seasonal incidence of leaf folder Cnaphalocrocis medinalis (Guence) and its correlation with weather parameters and natural enemies

Abstract

A field experiment was conducted during kharif season of 2018 at Agriculture Reserch Station, Sakoli, Dist. Bhandara (MS) under Dr. Panjabrao Krishi Vidyapeeth, Akola to study the sesonal incidence of leaf folder Cnaphalocrocis medinalis (Guence) and its correlation with weather parameters and its natural enemies. The result revealed that abundance of leaf folder was initiated from third week of August (33rd MW) with 0.12 per cent damaged leaves and reached peak level during second week of September i.e. 37th MW with 4.09 per cent damaged leaves. Furthermore, the fluctuation in the incidence were recorded, which again reached second peak during last week of October (44th MW) with 6.62 per cent damaged leaves. Then damage of leaf folder was gradually declined and reached to 0.66 per cent at the maturity of crop (47th MW). Incidence of leaf folder had significant positive correlation with maximum temperature (r= 0.606) and significant negative correlation with minimum temperature at 5% significant level.