Prune out galls before spring. Common Pests with Chewing Mouthparts Leaf Feeding Beetles Leaf feeding beetles are quite diverse in size and appearance. The grubs may be cream with no markings to colored with stripes and spots. All leaf feeding beetles have chewing mouthparts. Both stages feed on foliage.
Adults begin feeding on leaves and twigs in the spring.
Clusters of yellow eggs are laid on the undersides of leaves soon after. There are two generations per year. Adult blister beetles are foliage feeders. These beetles have a narrow, elongate, soft body. Their color is black, grey, or striped.