*4.2.2.1 Nature and symptoms of harm*

The oil palm is harmed by adults as well as grubs. Young seedlings that are 1–2 months old have their roots killed by grubs, which causes seedling mortality. Defoliation is caused by adults killing the leaves. It is a problem in Karnataka's red soils and to a little extent in the entire state.

#### *4.2.2.2 Management*

The incidence of the grub stage is decreased by adding 20 g of phorate 10 g granules to each nursery bag, however the incidence of adults is effectively decreased by adding contact insecticides like quinalphos (0.05%).

**Figure 9.** *Cockchafer beetles (root grub).*
