SEASONAL INCIDENCE OF TOBACCO CATERPILLAR, SPODOPTERA1 LITURA (FAB.) INFESTING SOYBEAN, GLYCIN MAX L.
Department of PlantProtection,Allahabad School of Agriculture Sam Higginbottom Institute of Agriculture Technology and Sciences (deemed-to-be-university) Allahabad-211007 (U.P.)
PRAHLAD KARAD, NEMI CHAND RATHORE AND ASHWANI KUMAR
The present investigation on seasonal incidence of tobacco caterpillar (Spodoptera litura Fab.) infesting soybean (Glycin max L.)" cultivar JS93-05 was conducted during Khan)" season 2012 at Agricultural research farm, SHIATS, Allahabad. The occurrence of tobacco caterpillar commenced from 33th standard week (August third week) with an average population of larvae 0.42 larvae/plant. The tobacco caterpillar population increased and gradually reached its peak level of larvae 4.42 larvae/plant at 38th standard week (September third week) there after declined trend was observed as relative humidity decreased. It was found that tobacco caterpillar population increased with increasing relative humidity and positively correlated with relative humidity.