Shashikant S. UdikeriManohar V. Shyadaguppi2016-11-142016-11-142011http://krishikosh.egranth.ac.in/handle/1/85392A season long fixed plot survey was conducted across 13 locations in Haveri district. On Kanaka Bt BG-II, the average population across the district was 128.3 + 18.2 mirids/100 squares with highest (284.5 + 60.2) in November first fortnight and least (14.5 + 3.4) in February. The population was high in Rattihalli (190.4 + 115.6) followed by Aladakatti (164.5 + 108.3) and least in Bisanahalli (87.8 + 70.2). Mirid menance was severe in Hirekerur and Haveri and least in Shiggaon taluk. There was significant positive correlation noticed between mirid incidence and squares on cotton plants. Mirid bug population had negative association with maximum and minimum temperature and positive association with morning and evening relative humidity and rainfall. The important predators viz., Spiders Chrysoperla carnea, Coccinellids and Nabis spp. showed positive correlation with mirid bug population. The species of mirid bug found to infest the cultivated crops viz., pigeonpea, maize, sunflower, safflower, sorghum, amaranths and castor. A total of 65.48 and 28.90 early and late instar mirid bugs were consumed by single C. carnea grub during its developmental period. However, third instar C. carnea was predominant predator with daily consumption of 8.04 and 3.40 mirid bug early and late instar nymphs. The feeding potentiality of Lynx spider, Oxyopes biramanicus was 5.39 nymphs and 2.36 adult mirid bugs per day. The EIL and ETL worked out appeared to be 6.50 and 5.00 nymphs/plant, respectively. Based on molecular study, it was evident that C. biseratense (Distant) occurring in different locations viz., Dharwad, Belgaum, Haveri, Raichur and Gulbarga on Bt cotton, pigeonpea and maize belonged to same species despite colour morphs.Agricultural EntomologyThesis