These insects can slow healthy growth or even kill entire peanut plants. This pest is the larval stage of the spotted cucumber beetle. To control corn rootworms, treat your soil with beneficial nematodes or with an insecticide such as diazinon. Thrips are microscopic pests that can transmit diseases among vegetables - especially in hot, humid climates. If you notice damage in the form of whitish patches on leaves, control with insecticidal soap or destroy severely infested plants.
White grubs live in the soil and feed on the underground parts of peanut plants.
The larvae are smooth and grayish white with hard brown heads. Control grub damage by growing green manure crops and by not planting peanuts where grass recently grew. Treat the soil with beneficial nematodes or milky spore powder. Their segmented bodies are hard and shiny, and like white grubs, wireworms feed on roots and other underground parts of peanut plants. Control wireworms with beneficial nematodes.