author(s)
Gulshan Kumar and Surender Singh Yadav

abstract
Population dynamics of insect- pests viz Aphis craccivora, Etiella zinckenella and Helicoverpa armigera on lentil was studied under field conditions during Rabi 2015-16. Peak population of A. craccivora (78.0 aphids/ 5 plants), E. zinckenella (11 larvae+ faecal material/ plant) and H. armigera (0.83 larvae / 5plant) was recorded on 7^th, 12^th and 9^th Standard meteorological weeks (SMW), respectively. Population dynamics studies revealed significant negative correlation of Aphis craccivora population with the Temperature (max. & min.) i.e r = -0.5015** and r = -0.6138*, significant positive correlation of Etiella zinckenella with the Temperature (Tmax. & Tmin.) i.e r = 0.8251*and r =0.8481* and non-significant correlation of H. armigera population with the abiotic factors.