Devendra PrasadDharamjeet Kumar2024-08-302024-08-302003https://krishikosh.egranth.ac.in/handle/1/5810214101The experiment were conducted on the research farm of Birsa Agriculture university ,kanke during Kharif 2000-2001 to achieve the objectives. Out of 19 insect pest associated with blackgram,leafminer, Bihar hairy caterpillar ,leafhopper, foliage feeder, semillopper thrips ans pod borers were categorized as major pests. Reaction of blackgram entries against insect pests. Out of 12 genetypes screened pant U-19 received minimum incidence of leaf miner , Bihar hairy caterpillar ,leafhopper, foliage feeder thirps and pod borers and also responsible for higher grain yield. Evolution of IPM modules against insect pests Lower incidence of leafhopper, ,leaf miner, foliage feeder Bihar hairy caterpillar semilooper and thrip were recorded resulting 89.29,97.13,90.32 ,77.78,85.00 and 85.56 percent reduction in the populations of respective pest were observed where all the carbora 3G @ 0.5Kg a.i./ha B1 collection and destruction of different stage of insect pests, C1 installation of bird perches and D1 foliar application of monocrotophos at the time of flowering .Soar benefit cost ratios are concerned highest B:C ratio (8.23:1) was recorded with the application of monocrophos at flowering as against two modules (4.86:1) viz. installation of bird perches along with spraying of monocrophos. Efficacy of insecticides and their combination with NSKE against insect pests associated with blackgram. All the insecticides were proved to be effective on reducing the incidence of insect pests as comparted to untreated control . Imidacloprid was found to be effective in suppressing the populations of leafhopper, leafminer and thrips to the extent of 80.64, 86.67, and 83.50 percent, respectably , at 10 Dat . Higher reduction in the population of Bihar caterpillar was obtained with thev application of dichlorovos (81.83), Chloryriphos (81.25% ) and lambda cyhalothrin (80.96%). Chlorpyriphos, dichlorovos and lambda cyhalothrin were found to be equally effective in minimizing the pod damage as well as achieving the higher grain yields resulting 193.74, 181.54 and 194.10 percent more yields respectively. Considering the value of additional yields cost of insecticides and their applications lambda cyhalothrin,dichlorvos and chlorpyriphos were proved to be economical in achieving the higher B:C ratios of 9.33:1, 9.01.1:1 and 8.13 :1 respectively. Considering the overall findings of the present investigation , it was concluded that blackgram should be grown under the protections of either lambda cyhalothrin, dichlorvos, monocrophos or chlorpyriphos at the time of flowering resulted lower incidence of insect pests and higher B:C ratio ranging between 9.33:1 and 8.13 :1EnglishThesis