author(s)
Vipan Kumar, SK Sachan, Sushant Kumar and Arun Kumar

abstract
This research was conducted at Crop Research Center of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) during Kharif, 2018. The data revealed that first infestation of yellow stem borer was recorded on first week of August and reached its peak during first week of October when temperature, relative humidity and rainfall ranged from 20.70 to 35.90 ⁰C, 58.90 to 96.10%, and 0.00 mm, respectively. The population of leaf folder was first recorded on first week of August and reached at maximum level during last week of September when mean temperature, relative humidity and rainfall ranged from 27.80 ⁰C, 74.85% and 37.0 mm, respectively. The population of yellow stem borer and leaf folder showed negative correlation with minimum and maximum temperatures, evening relative humidity and rainfall while morning and mean relative humidity showed the positive correlation.