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A Japanese beetle feeding on a rosebud. Photo: Suzanne DeJohn
Often appearing en masse in summertime, these metallic green beetles feed on a wide range of garden plants, especially beans, basil, raspberries, grapes, hollyhocks, and roses. The beetles chew out the tissue between the veins of leaves and flowers, leaving behind a lacy skeleton.
Adults feed and mate all summer long. Eggs are laid in late summer, primarily in lawn areas close to the plants they have been feeding on. The eggs hatch into 1″, C-shaped white grubs. Before burrowing deep into the soil to overwinter, the grubs feed on plant roots — especially those of lawn grasses. In spring the grubs migrate back to the soil surface to pupate emerge as adults in early summer. Japanese beetles are a major garden pest in almost all areas east of the Rockies.
Read the article Controlling Japanese Beetles.
Last updated: 10/24/15
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