Rana, D.K.RenukaChandrakar, GajendraKotasthane, A.S.Saxena, R.R.2020-03-192020-03-192020http://krishikosh.egranth.ac.in/handle/1/5810145662SEASONAL INCIDENCE, POPULATION DYNAMICS AND EFFICACY OF DIFFERENT COMBINATION OF INSECTICIDE AGAINST SUCKING PESTS OF CHILLI (CAPSICUM ANNUM L.)The present investigation entitled “Seasonal incidence, population dynamics and efficacy of different combination of insecticide against sucking pests of Chilli (Capsicum annum L.)’’was carried out in the research field of Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh) during season Rabi 2018-19. Incidence of thrips (Scirtothripsdorsalis), mite (PolyphagotarsonemuslatusBank), aphid (Aphis gossypii), and tobacco caterpillar (Spodopteralitura) were revealed as major insect pests on chilli crop. Lady bird beetle and spider as natural enemies on sucking pests of chilli were also recorded. The peak activity of thrips (22.2/plant), mite (1.44/plant), aphid (18.97/plant) and tobacco caterpillar (2.30/plant) were recorded during first week of March, second week of April, first week of February and fourth week of January, respectively. The incidence of natural enemies viz. lady bird beetle and spider population was recorded as maximum 4.9 per plant during third week of April and 3.21 per plant during the first week of January, respectively. The thrips had positive and significant correlation with maximum temperature (r = 0.396*) and wind velocity (r = 0.543*) and negative significant correlation with morning relative humidity (r = -0.398*). The population of mite showed positive significant correlation with maximum temperature (r = 0.393*) and wind velocity (r = 0.516*). The population of aphid showed positive significant correlation with morning relative humidity (r= 0.410*) and significant negative correlation with maximum temperature (r= -0.456*) and highly negative and significant with minimum temperature (r= -0.494**). Aphid population showed significant negative correlation with lady bird beetle (r= -0.464*). Efficacy of Emamectin Benzoate 3.5% + lambda cyhalothrin 5% WP @ 21.25 g a.i./ha against thrips, mite and aphid was found to be most effective chemical because it recorded the lowest insect mean population along with maximum healthy fruit yield (94.66 q/ha) with highest cost benifit ratio of 1 :7.44. The second best treatment was Emamectin Benzoate 3.5% + lambda cyhalothrin 5% WP @ 16 g a.i./ha and fruit yield 92.72 q/ha.No adverse effect was observed on natural enemiesviz.coccinellid and spider population after application of Emamectin Benzoate 3.5% + lambda cyhalothrin 5% WP.ennullThesis