author(s)
RN Borkakati, Venkatesh MR and DK Saikia

abstract
Field fixed plot survey was conducted during rabi 2017-18 to investigate the insect pests and natural enemies of brinjal in the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat. During the course of the investigation a total of six insect species under three order and six families viz., aphid, Aphis gossypii (Glover); leafhopper, Amrasca biguttula biguttula (Ishida); Brinjal Shoot and Fruit Borer (BSFB), Leucinodes orbonalis (Guenee); epilachna beetle, Henosepilachna vigintiopunctata (F.); leaf roller, Antoba (Eublema) olivaceae (Walker) and flea beetle, Monolepta signata (Olive) were recorded. On the other hand, a total of four predators viz., coccinellid beetle, syrphid fly (Episyrphus balteatus De Geer), green lacewing (Chrysoperla carnea Stephens) and spider (Oxyopes sp.) were recorded as major natural enemies on insect pests of brinjal. However, 5 species of coccinellid predators viz., Coccinella transversalis (Fab.), Harmonia dimidiata (Fab.), Adalia bipunctata (L.) Cheilomenes propinqua (Muls.), and Brumoides sp. (Fab.) were observed out of which, C. transversalis was dominant and considered as major predators of aphids and leafhoppers.