Chew leaves, fruit and tender stems of plants. Evaluate the infestation, as most beetle infestations are not a significant threat to the health of the plant.
Row covers are an effective barrier in vegetable gardens.
Systemic pesticides are taken up by the plant and make its tissues and fluids toxic to the feeding beetles. Non-systemic pesticides must be applied to all infested plant surfaces for best results, because they must come into direct contact with the insects. Avoid over-use of chemicals. Many pests have become resistant to certain pesticides. Mix according to directions and apply only recommended dosage.