Corn earworms rest over the winter as pupae several inches below the soil surface. When spring arrives, they come to the surface as adults through tunnels in the soil. They mate and lay eggs that hatch three days later as larvae, which begin feeding on a wide variety of vegetables. Cucumber beetles, stink bugs and certain aphids overwinter as adults in protected areas at the base of plants, under tree bark, and in wood and trash piles. Other aphids spend the winter as eggs attached to host plants, in plant cracks or under tree bark.
Japanese beetles escape winter cold as grubs in the ground.
They begin feeding on grass roots in March, form a cell and pupate. They emerge as adults in early June. If the weather has been dry for a while, they can be seen emerging in large numbers when rainfall softens the ground. In the adult stage, Colorado potato beetles spend the winter several inches below the soil surface. They come out in spring, along with the first potato shoots.