Effect of Weather Parameters on Population Dynamics of Mustard Aphid

Abstract

Among the natural enemies of mustard aphid, Coccinella septempunctata and Syrphid flies are dominating. During the experimental year 2017-18, it was observed that the appearance of ladybird beetle that is Coccinella septempunctata was 0.30 as seen in the fourth standard week of observation when the aphid population was growing high and it was equal in comparison with the Syrphid fly (0.30). The correlation of ladybird beetle was-0.012 with the maximum temperature while with the minimum temperature it was-0.162 and Syrphid fly was found-0.180 with the maximum temperature and-0.176 with the minimum temperature (negative and non-significant).