author(s)
Shivaray Navi, Shashi Kumar C, Somu G, Meena N, Krishna Kishore R and Rajendra B

abstract
A field experiment was conducted during kharif season of 2019-20 at AICRP on Cotton scheme, Chamarajanagara, to study the seasonal variation of sucking pests incidence in non Bt cotton hybrid (DCH -32). From the data it is observed that the population of leafhopper was above ETL in almost all standard meteorological week (SMW) with peak population of 7.20 and 6.80/3 leaves during 35^th and 36^th SMW, respectively. While, the occurrence of aphids was noticed throughout the cropping season. The peak incidence was observed at 36^th SMW (55.15/3leaves). Mirid bug incidence was started from 35^th SMW and attained its peak during 42^nd SMW and declined thereafter. The population of whiteflies and thrips didn't cross ETL during the entire cropping season. Correlation study revealed that the morning and evening relative humidity had a positive influence on the population of sucking insect pests including the activity of natural enemy (coccinellid beetles). Whereas, maximum and minimum temperature had a detrimental effect on the population of sucking insect pests.