author(s)
MP Gautam, Umesh Chandra, SK Yadav, Ramesh Jaiswal, SK Giri and Shesh Narain Singh

abstract
The present investigations entitled “Studies on population dynamics of Helicoverpa armigera (Hubner) on chickpea” was carried out at Students’ Instructional Farm of Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad during Rabi, 2016. It is evident from the data that the Helicoverpa armigera population was started since the vegetative stage and continued up to maturity stage of the crop. Larvae were found on whole plant. Due to its attack, the leaflets become cup shaped and yellow at the edges. Heavy infestation whole plant become dried and finally defoliate at last. Helicoverpa armigera population were noticed for the first time during 46^th SW of 2016 and respective mean population were 0.33 larvae/plant.The lowest mean population H. armigera is 0.33larvae/plantwas recorded during 46^ndand 47^th SW at the minimum temperature of 11.8 °C, maximum temperature of 29 °C, relative humidity 67.4 and there were no rainfall. Whereas maximum mean population of Helicoverpa armigera population of 5.67 larvae/plant was recorded during 08 SW of 2017 at the minimum temperature of 11.1 °C, maximum temperature of 27.9 °C, relative humidity 63.9 and there were no rainfall.