A study was conducted during two consecutive year of 2019 and 2020 to assess the effects of various abiotic determinants on incidence of various insect pest along with its natural enemies and pollinators of fenugreek under gangetic alluvial plains of West Bengal. Sucking pests appeared as the major pest complex and aphid (Apis craccivora) was found to be as the major pest. It appeared on third week of November and continued till second week of March of the next year, and was predominantly a pest of the vegetative stage of crop. Other important pests were white fly, thrips and jassid which appeared at early stage of crop and continued till harvest of the crop while leaf miner and ash weevil appeared at later stage during the crop growing season. Temperature was found to be the most important abiotic determinant for pest population build up in fenugreek ecosystem. Natural enemy population comprised of generalist predators like spiders, coccinellids, syrphid fly, mantids etc. Amongst the pollinators, wild honey bee (Apis dorsata) was recorded in comparatively higher numbers over others.