Control cucumber beetles by applying a suggested insecticide. Squash bugs can be a problem on older squash plants. They can cause considerable damage to the foliage and may even strip the plant of leaves. These insects are easy to control when they are young in the nymph stage. As they reach the adult stage, squash bugs are nearly impossible to control.
Flea beetles are small, black beetles about the size of a large pinhead.
They eat numerous small holes in the leaves. They tend to be more of a problem on young plants. Watch for buildup of colonies of aphids on the underside of the leaves. Use a suggested insecticide if colonies appear. Pickleworm is the larvae of a moth that lays eggs in the squash flower.