Seasonal incidence of rice yellow stem borer, Scirpophaga incertulas (Walk.) and its correlation with weather parameters and natural enemies

Abstract

A field experiment was conducted during kharif season of 2018 at Agriculture Research Station, Sakoli, Dist. Bhandara (MS) under Dr. Panjabrao Krishi Vidyapeeth, Akola to study the seasonal incidence of major insect pests in an experimental plot of 500 m2 and incidence of major insect pests were correlate with natural enemies and abiotic factors. The results revealed that, Incidence of rice stem borer was initiated from 32nd MW and continued to 47th MW and its peak incidence during 36th MW (6.45% DH) and 42nd MW (11.23% DH). Similarly 5.9 per cent white earheads was recorded before harvesting during 47th MW. The peak population of spiders was observed at 47th MW (0.67 nos./hill) and the correlation analysis results revealed that, minimum temperature (r= -0.501) had significant negative correlation with incidence of rice stem borer.