Abstract

Research Article 

Relative efficacy of certain insecticides against mustard aphid in mustard ecosystem

Shweta Patel, C.P. Singh and Wajid Hasan^*

 Department of Entomology, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar – 263 145, U.S. Nagar, Uttarakhand, India 

^*Present Address

Krishi Vigyan Kendra, Jeahanabad, BAU Sabour, India

^*Corresponding author e-mail: entowajid@gmail.com

ABSTRACT

Studies on the efficacy of eight insecticides against mustard aphid, Lipaphis erysimi (Kalt.) on Brassica juncea cv. Varuna as foliar spray were carried out at Norman E. Borlaug Crop Research Center of G.B. Pant University of Agriculture and Technology, Pantnagar (India) during Rabi season of 2018-19. Studies revealed that after third and seventh days of spray, Dimethoate 30 EC, Thiamethoxam 25 WG and Imidacloprid 17.8 SL proved most effective against mustard aphid. The maximum seed yield of 21.69 q/ha was recorded in thiamethoxam, which remained on par with imidacloprid (21.43 q/ha) and dimethoate (20.69 q/ha). The lowest seed yield was obtained from untreated plots (10.44 q/ha).

Keywords: Mustard, bio-efficacy, insecticides, yield, Lipaphis erysimi