Insect Pests of Oilseed Crops and Their Management

Le résumé fourni par la source

The oilseeds crop occupies an important position in agriculture economy in the world. A wide range of oilseed crops is produced in different agro-climatic regions of the country. Insects-pests are one of the limiting factors in the production of oilseed crops. The insect reproduce partheno-genetically, the females give birth to average 26-133 nymphs. In favourable conditions they grow very fast and are full-fed in 7-10 days. The honeydew excreted by the aphids provides congenial conditions for the growth to development of sooty mould on the plant. In case of severe infestation the crop yield may be reduced up to 80 per cent. Mustard sawfly is a major pest of cole crops but it affects almost all cruciferous plants, including rape and mustard. Eggs are laid singly, mostly during day time and inserted into leaf tissues with the help of saw like ovipositor. On hatching the grubs nibble the margins of tender leaves but later on bite holes in the leaves.

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