Japanese beetle larvae are a type of white grub that feeds on the roots of grasses. The antennae are clubbed at the end and may spread to a fan-like form.
Along the sides are five patches of whitish hairs. It is generally metallic green with copperybrown wing covers, which do not quite cover the tip of the abdomen. The adult Japanese beetle has an oval form is about 7/16-inch in length. At some of these sites high numbers of Japanese beetles now regularly occur and adult beetles are causing significant damage to leaves and flowers of many susceptible landscape plants. Recently, there have become a few permanent, reproducing populations of this insect in some communities along the Front Range of Colorado. From left to right: egg, larva (stage I), larva (stage II), larva (stage III), pupa, adult.įor close to a century, the Japanese beetle ( Popillia japonica) has been one of the most seriously damaging insect pests of both turfgrass and landscape plants over a broad area of the eastern US. Photograph courtesy of David Shetlar, the Ohio State University.įigure 7. White grubs feed on the roots of grasses. Japanese beetles that feed on leaves produce a characteristic skeletonizing pattern.įigure 6. Photograph courtesy of David Shetlar, the Ohio State University.įigure 5. The rastral pattern is located on the underside of the tip of the abdomen. The rastral pattern that is distinctive for white grubs of the Japanese beetle. Photograph courtesy of David Shetlar, the Ohio State University.įigure 4. White grubs (larvae) of the Japanese beetle. Japanese beetle damage to leaves of grape.įigure 3. Rose blossoms are one of the most highly favored foods of Japanese beetles.įigure 2. Japanese beetle larvae can be controlled with certain insecticides or by insect parasitic nematodes.įigure 1.Japanese beetle traps can capture many adults but have never been shown to reduce damage to nearby plants.Adults are best controlled by handpicking or by use of certain insecticide sprays.Japanese beetle larvae are a type of white grub that feeds on the roots of grasses.Japanese beetle adults chew flower blossoms and leaves of many commonly grown plants.
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