Reaction of Genotypes/Varieties Against Mustard Aphid (Lipaphis erysimi) and their Parasite, (D. rapae)

Fifty mustard cultivars were evaluated under field conditions against Lipaphis erysimi Kalt. and their parasite D. rapae at Collage of Agriculture Gwalior. On the basis of two year data the aphid population on different varieties ranged from 37.0 to 112.5 aphid/twig. Variety NC-1 was found less susceptible to aphid followed by JTC-1, Pusa bold, Varuna and YRT-3. Whereas variety NRCDR-2 was found highly susceptible to aphid followed by RMWR-09-7, JGM901, Pusa jagannath and Shraddha. The mummified aphid by D. rapae on different genotypes range from 0.7 to 3.2 per twig. Variety Varuna was found favourable for parasitization of aphid by D. rapae.