Vol. 18 No. 3
Efficacy of module based integrated approach to combat major insect pests infesting summer green gram
The research study was carried out at District Seed Farm (A-B Block) of B.C.K.V. during two consecutive pre-kharif seasons of 2017 and 2018 to find out the comparative efficacy of an IPM module in rectifying the pest problem on summer green gram over farmers’ practices. Green gram variety ‘IPM 02-3’ was accommodated in the IPM module, whereas one popular variety ‘Samrat’ was considered for farmers’ practices. Experimental results reveal that IPM strategies including seed dressing with imidacloprid 17.8 SL @ 5 ml kg-1 seed, setting up of yellow sticky traps @ 50 numbers ha-1, spraying of NSKE 5% (i.e. 50 g l-1 of water), spraying of thiamethoxam 25 WG @ 0.4 g l-1 for sucking pests and spinosad 45 SC @ 0.2 ml l-1 for pod boring insects altogether quite effectively reduced the population of whitefly (5.62 per trifoliate) and thrips (1.98 per ten flowers), pod damage caused by Maruca vitrata (6.72 per cent) as well as increased the yield considerably during both the years. The farmers’ practice involving four rounds of spray with a pre-mixture insecticide i.e. chlorpyriphos 50% + cypermethrin 5% EC at 2 ml l-1 of water at ten days gap recorded higher pest population (whitefly 31.14 per trifoliate and thrips 20.09 per ten flowers) and pod damage (30.55 per cent) caused by spotted pod borer. Comparatively more produce and higher benefit cost ratio was also gained from IPM strategy in comparison with farmers’ practices, hence the above mentioned IPM module can be recommended for better and profitable pest management in summer green gram over growers own methods of cultivation.
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