Vol. 9, Issue 12, Part A (2025)

The experiment on seasonal incidence of cowpea aphids, Aphis craccivora Koch was carried out at the Instructional Farm, Department of Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra during kharif 2024. The study revealed that, cowpea aphid, A. craccivora Koch population ranged from 1.8 to 35.8 aphids/10 cm twig/plant during the crop growth period. First incidence of cowpea aphid was noticed in 28^th standard meteorological week (SMW) (1.8 aphids/10 cm twig/plant) i.e. 2^nd week of July and continued upto 38^th SMW (9.6 aphids/10 cm twig/plant) i.e. 3^rd week of September. Minimum population of cowpea aphid was noticed in 28^th SMW i.e. 2^nd week of July afterwards population of cowpea aphid gradually increased upto 32^nd SMW i.e. 1^st week of August (28.6 aphids/10 cm twig/plant) and reached to its peak of 35.8 aphids/10 cm twig/plant during 33^rd SMW i.e. 3^rd week of August. In this study highly significant positive correlation was noticed between incidence of cowpea aphid and maximum temperature (r = 0.641*). However, it had non-significant and negative correlation with minimum temperature (r = -0.112), morning relative humidity (r = -0.051), evening relative humidity (r = -0.221) and rainfall (r = -0.361).