author(s)
Mantesh Soratur, Devika Rani D and Shiva Murthy Naik

abstract
The studies on the population dynamics of major pests of cow pea were conducted during 2016- 2017 in the agricultural fields of Bangalore, India. Pest population was showing positive correlation with high temperature and the population of predators and other associated insect was showing negative correlation with minimum temperature, relative humidity and rainfall. The activity of jassids were observed from 1st week of September, 2016 with 0.85 nymphs per 3 leaves (36th MW), during this period average maximum and minimum temperature, morning and evening relative humidity and rainfall recorded were 27.20 ⁰C, 18.50 ⁰C, 91 percent, 55 percent and 12.8 mm respectively. The population of jassids decreased steadily and was at its lowest level on second week of October. The incidence of thrips were observed from first week of September, 2016 with 1.20 thrips per 3 leaves (36th MW), during this period average maximum and minimum temperature. Then after population started increasing up to 3rd week of September, The activity of pod sucking bugs started after the flowering stage of the crop i.e. third week of October, 2016 (42nd MW) with 0.53 bugs per plant. At the time of first observation in 2nd week of August, 2016 (35th MW) population of coccinellid grubs were increased, population started declining up to second week of October. Hence the information contained in this paper lead to the identification of the proper integrated pest management (IPM) practices for pest management.