Response of soybean cultivars against major insect pests and their natural enemies

Abstract

Present investigation was conducted at Rajmata Vijayaraje Scindia Krishi Vishwa Vidhyalaya-Zonal Agricultural Research Station, Morena (M.P.) to evaluate the ten cultivars of soybean against major insect pests and their natural enemies. The minimum incidence of majorinsect pest viz, whitefly (0.69/three leaves), stem fly (22.13 % stem tunneling), girdle beetle (24.97 %), green semilooper (1.10 larvae/mrl) and tobacco caterpillar (2.90 larvae/mrl) was observed in soybean cultivar JS-20-34.Cultivar JS-20-34 was found resistant to major insect pest of soybean. Cultivar MACSNRC-1575 was found susceptible against whitefly. Soybean cultivars NRC- 132 was observed susceptible to stem fly and girdle beetle. Cultivars AMS-100-39 and NRC-147 was found susceptible against semilooper and tobacco caterpillar.Maximum population of natural enemy(lady bird beetle) was recorded in cultivarsJS-335 followed by AMS-100-39, MACSNRC-1575 and NRC-130.In the present study cultivars JS-20-34 was found tolerant to major insect pest and suitable to cultivation the area.