Seasonal incidence of mustard aphid relation to abiotic factors

Gobhi sarson-07 was sown as an experimental crop. Crop were seeded on November 6th during the 2023 experimental year.Occurrence of Lipaphis erysimi Kalt on mustard began in the first standard week in the experimental year of 2024 at Lovely professional university, Phagwara, Punjab. Initially Lipaphis erysimi Kalt population was low, at (4.9 per 10 cm top twig) but it rapidly increased, peaking at (166.30) during 8th standard week in the year of 2024. Population started decline in the Thirteen standard week. During 2023-24 the windspeed is positively significant and it had a negative correlation with relative humidity (both morning and evening), minimum temperature, and rainfall. Maximum temperature exhibited a positive correlation as well number of rainy days is non-significant.