author(s)
Basant Kumar Singh, Shri JL Chaudhary, Dr. GK Das and Sagar Tiwari

abstract
The present study on ‘Effect of weather parameters on populations dynamics of tobacco caterpillar (Spodoptera litura) for Soybean crop in Raipur district of Chhattisgarh’ was conducted during the 2019 Kharif season at the Indira Gandhi Krishi Vishwavidyalaya Instructional Research Farm, Raipur Chhattisgarh, to validate the findings of the effect of weather parameters on population dynamics of soybean tobacco caterpillar. Tobacco caterpillar insects often cause soybean crop damage, resulting in significant losses in yield. The purpose of the current study is to establish the effects of these environmental factors on the severity of this insect pest. Such findings may provide reliable methods for identifying environmental conditions that are conducive to the growth of the specific insect pest. Correlation analysis of current insect population data of soybean tobacco caterpillar and weather parameters was carried out. The findings showed that there was a substantial negative correlation between the population of Soybean tobacco caterpillars and the maximum temperature (r = -0.43*), while there was a significant positive correlation between the minimum temperature (r = 0.42*), the morning relative humidity (r = 0.41*) and the evening relative humidity (r = 0.43*). There was a non-significant relationship between rainfall (r= 0.28) and hours of sunshine (r= -0.26). The minimum temperature and relative humidity showed the highest degree of association with the soybean tobacco caterpillar among all the weather parameters.