author(s)
Gajendra Singh, AK Singh, SK Giri, SK Yadav and Ramveer

abstract
The present investigation was conducted to study the occurrence of major insect-pests of Indian mustard (Brassica juncea L.) during Rabi, 2016-2017 at major insect-pests from germination to pre-harvest stage of the crop at three farmers ‘fields. In the village Pithla, Shivnathpur and Jorium of Narendra University of Agriculture and Technology, Kumarganj Faizabad total of five insects namely mustard sawfly, mustard aphid, painted bug, cabbage butterfly and Coccinellids was found associated with mustard crop of these first were found as pests and the Coccinellids as the predator of aphids. The mustard sawfly appeared at an early stage of crop growth 48^th SW of 2016 and population ranged from 0.20 grubs/10 plants to 4.10 grubs/plant. The 1^st occurrence of mustard aphid was recorded during 52^nd SW of 2016 which continued up to 11^th SW of 2017 with varying population ranging from 2.20 to 82.00 aphids/10cm central twig/10plants. The population of painted bug initiated during 49^th SW of 2016 and remained up to 3^rd SW of 2017.The bug population ranged from 2.10 to 8.20 bugs/10 plants. The cabbage butterfly made its first appearance during 6^th SW of 2017 and continued up to 11^th SW of 2017 with population varying from 1.10 to 12.80 insect /10plants. The first appearance of Coccinella spp. was recorded during first SW of 2017 which continued up to 11^th SW of 2017.