Field experiment was conducted in order to study the population dynamics of painted bug on different varieties of Brassica spp. at different dates of sowing at Crop Research Centre (CRC) of G.B. Pant University of Agriculture and Technology, Pantnagar (India). Eight spp. of Brassica including Brassica campestris cv. BSH-1, Brassica alba, Brassica carinata, Brassica nigra, Eruca sativa cv. T-27, Brassica juncea cv. Varuna, YST-151 and GSC-6 were sown on five dates of sowing starting from October 3 to December 3, 2015 at fifteen days interval. The data on the seasonal incidence of the B. hilaris on the different sown mustard crop during Rabi seasons of 2015-16 revealed that the infestation of the pest on the crop occurs in two distinct peaks i.e., one at the seedling stage and other at the crop maturity stage B. alba and B. nigra species harboured relatively higher population of painted bug than other Brassica spp. i.e. these varieties are more susceptible to painted bug.