Rapeseed-mustard is an important rabi season oilseed which constitutes about 44 % of the total vegetable oil production of the country after soybean and palm oil. There are number of constraints like biotic and abiotic stresses, on-farm and off-farm technological and non-technological problems, in the successful cultivation of rapeseed-mustard. Among the biotic stresses, the damage caused by insect-pests, is one of the major impediments. Mustard aphid alone is known to cause 23 to 96 % reduction in yield, if not managed timely. A number of other insect-pests also caused damage atone or the other stage of the crop. For an efficient and effective management of these pests, farmers need to be vigilant right from sowing till harvest of the crop. Insecticides should only be used only when needed. A thorough understanding of biology, behaviour, time of appearance and nature ~~| of damage of the pest on the crop is important.
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