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Description: Metallic green/copper adult grows to 1/2" long. Larvae or grubs are grayish-white with brown head; fat body is 3/4" long. Adults especially like beans and corn but will eat almost any plant, often skeletonizing the leaves. Larvae chew on roots of lawn grass, bean, beet, sweet corn, onion and tomato; except during cultivation, they are seldom noticed, but their root pruning action severely reduces crop yields and can kill grass. Growth of grubs and root damage is mostly in June. Adults cause damage from late June to early September.
Solution: For season-long control of these grubs and lepidoptera larvae, spray Oil AwayTM Supreme. For adult beetles use Surround® At Home® as soon as adult beetles are noticed. Continue spraying every 7-14 days during the growing season; increase interval to 14-21 days as plant growth slows. Reapply after heavy rains. Otherwise, apply Pyola™ Insecticidal Spray to kill them; or Japanese Beetle Traps with pheromone lures to mass-trap them. Set out traps in mid-June, before beetles emerge, preferably in sun, 50 feet or more upwind of vulnerable plants.
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Japanese Beetle