Management of major insect pests of rice through HPR and judicious insecticides application Prasad Rabindra*, Hembrom Lakhindar, Kumar Binay, Prasad Devendra Department of Birsa Agricultural University, Kanke, Ranchi-834006 (Jharkhand) *Email: rabindraento@yahoo.co.in
Online published on 30 November, 2019. Abstract The experiment was conducted at the farmer's field in village Khunte Tola of block and district Simdega in Jharkhand with eight rice varieties having three replications in the randomized block design, under protected and unprotected conditions during wet season of 2013 and 2014. Results revealed that the rice variety Naveen registered lowest silver shoot due to gall midge (Orseolia oryzae) (1.85%) under protected conditions, which was almost at par with 0.1 R-36 (1.98%) and Lalat (2.02%). As regards, yellow stem borer, Scirpophaga incertulus infestation, the Lalat variety under protected conditions showed minimum incidence of dead hearts (2.2%) against maximum of 3.5 per cent in Naveen. Varieties IR-36, Lalat and Naveen recorded lower incidence of gall midge silver shoot and yellow stem borer dead hearts as well as ear heads under protected conditions, showing tolerance against the susceptible varieties, IR-64, Birsa Mat i, PAC-801, PAC-807 and TN-1. The findings suggest that pest susceptible varieties require more insecticidal protection as compared to those of the pest resistant/tolerant varieties. Moreover, need based protection measures proved effective in general irrespective of the varieties grown for enhancement of grains yield. As such, higher yield enhancement to the tune from 28.72 to 40.97 q ha−1; 24.92 to 40.85 q ha−1; 24.92 to 39.34 q ha−1; 27.20 to 37.97 q ha−1 and 30.38 to 37.30 q ha−1 were obtained in case of the test rice varieties viz. PAC-807, Naveen, Birsa Mati, IR-64 and PAC-801 due to enforcement of varietal intervent ion coupled wi th need based insect icidal protect ion. Hence, HPR and need based insecticide application could form one of the effective tool for minimizing yield loss caused by the major insect pests of rice. Top Keywords Rice, HPR, stem borer, gall midge, insecticide, pest management, yield. Top |