Vol. 12, Special Issue 12 (2023)

Author(s):
Saroj Jat, MK Mahla, Deepak Kumar Saini and S Ramesh Babu

Abstract:
The experiment on “Population dynamics of major sucking insect pests infesting Bt. cotton (Gossypium hirsutum L.) and their natural enemies” was carried out at Agronomy Farm, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur during kharif, 2019. The population of aphids reached its peak during the 40^th SMW (49.20 aphids/plant). The peak population of jassids (30.25 jassids/plant) and whiteflies (32.40 whiteflies/plant) was recorded during the 34^th SMW and 31^st SMW, respectively. The peak population of thrips (41.60 thrips/plant) was recorded during the 36^th SMW. Whereas, the peak population of mealybugs (26.00 mealybugs/10 cm twig) was recorded during the 37^th SMW. The correlation coefficient study reveals that the population of jassids, aphids, whiteflies, thrips and mealybugs was positively correlated with mean temperature, relative humidity and total average rainfall, and the population of these pests was found significantly positive with the relative humidity.