Role of Plant Density and Abiotic Factors on Population Dynamics of Helicoverpa armigera (Hübner) in Chick pea

Population dynamics of Helicoverpa armigera on chick pea revealed that higher population of larvae and pupae, also higher density crop harboured more population than low plant density crop. Larval population build up in chick pea started during 9^th standard week at vegetative stage of the crop and reached its maximum during 14^th and 15^th standard week, there after the larval population declined after 19^th standard week. Pupal population could be observed from 12^th standard week with a highest population at pod maturation stage. Pod damage at crop maturation stage ranged between 17 to 45%. Maximum temperature and wind velocity were found positively correlated with pupal population.