author(s)
Rupashree Das

abstract
A study was conducted to explore the diversity of the insect fauna associated with brassicaceous ecosystem of Cachar district, Assam during 2019 - 20. The total collection of insects comprises with 12 species of herbivores and 16 species of predators. In present study, diamondback moth (Plutella xylostella), Mustard aphid (Liphaphis erysimi), Cabbage butterfly (Pieris canidia), mustard sawfly (Athalia lugens proxima) and flea beetle (Phyllotreta cruciferae) were found as major pests of brassicaceous plants in this region; while Cabbage leaf worm (Pieris repae), flea beetle (Monolepta signata), Cutworm (Agrotis ipsilon), leaf eating caterpillar (Spodoptera litura), cabbage semilooper (Plusia orichalcea), leaf webber (Crocidolomia binotalis), Green bug (Nazara viridula) were appeared as minor pests. Among the natural enemies, Coccinella transvarsalis, Menochilus sexmaculatus, Syrphus spp, Sphaerophoria spp and Sphaerophoria scripta were dominant predators in field.