Population Dynamic of Leaf Hopper ( Amrasca biguttula biguttula ) on Brinjal and Effects of Abiotic Factors on its Dynamics

摘要

Population dynamic of leaf hopper ( Amrasca biguttula biguttula ) on brinjal crop and effect of abiotic factors on its dynamic were studied. The leaf hopper started the activity soon after transplanting. The serious activity was noticed from 21st May to 6th August. The highest leaf hopper number per leaf was found as 12.96 + 0.93 on 9.7.96. Mean maximum and minimum temperature were found as positively and significantly correlated with population change. Relative humidity and rainfall was found as negatively and non-significantly correlated with population fluctuation. Sunshine was also positively but non significant correlated factor.