Seasonal and temporal variation in population of Myzus persicae on Brassica carinata in different dates of sowing

Abstract

The present field experiment was carried out to study the incidence of Myzus persicae on Brassica carinata in different dates of sowing at Norman E. Borlaug Crop Research Center of G.B. Pant University of Agriculture and Technology, Pantnagar, India during Rabi 2015-16 and 2016-17. B. carinata was sown on five dates of sowing starting from October 3 to December 3, 2015 and 2016 at fifteen days interval. The population of Myzus persicae recorded on b. carinata in present study differ significantly with respect to different dates of sowing in both the years. regarding the date of sowing, overall mean population of green peach aphid was found the maximum in second(134.8 per 3 leaves) and fifth(114.2 per leaves)date of sowing while minimum in fourth(77.6 per leaves) date of sowing during both the seasons. however, the green peach aphid population was found higher during Rabi 2015-16 compared than 2016-17.