SUMMARY : Studies was carried out during Kharif 2015-16 and 2016-17 to investigate on estimation of yield losses due to sucking pests viz., aphids, leafhoppers, thrips and whiteflies, the unprotected treatments recorded significantly higher aphid population over protected ones with 14. 81, 5.61, 15.08, 12.41 and 3.66, 1.90, 3.83, 1.81 sucking pest per three leaves, respectively, with 75.29, 66.13, 74.63 and 85.41 per cent overall increase in population in the unprotected treatments over protected treatments ones. The yield differed with protection irrespective of protected and unprotected condition observed that on an average significantly more yield (18.67 q/ha) was obtained under protected condition as compared to unprotected condition (12.47 q/ha) with avoidable loss of 33.02 per cent by unprotected condition over protected condition ones.