Preference of mustard aphid, Lipaphiserysimi (Kalt.) to different Brassica species.

Rapeseed-mustard is most important source of edible oil for human consumption. India is the second largest producer of rapeseed-mustard after China. To increase the productivity of this commodity, various modern techniques of agricultural practices such as use of high yielding varieties and heavy manuring were used (Srivastava and Guleria, 2003).Rapeseed-mustard is highly vulnerable to attack of various insect pests. In this regard, Bhaketia and Sekhon (1989) reported more than three dozens insect-pests associated with this crop. Among them, mustard aphid, Lipaphiserysimi Kalt. ABSTRACT