Japanese beetle management in Minnesota. These grubs live in the soil during development and survive by feeding on the roots of grass. NAPIS. The presence of adult Japanese beetles in July is not an indication that turf damage will occur. Sod, soil or nursery stock must be certified as free of Japanese beetle if it is going to be shipped to states without Japanese beetle. Adult Japanese beetle, Popillia japonica Newman, feeding damage on rose bloom.
 Additionally, when present in small numbers, the beetles may be manually controlled using a soap-water spray mixture, shaking a plant in the morning hours and disposing of the fallen beetles, or simply picking them off attractions such as rose flowers, since the presence of beetles attracts more beetles to that plant. The adults are voracious feeders that damage a wide variety of ornamental shrubs and trees. Japanese Mow the turf to be treated prior to application to make sure there are no open flowers attractive to bees. Ladd TL Jr. 1970.
Currently the Japanese beetle is the most widespread pest of turfgrass and costs the turf and ornamental industry approximately $450 million each year in management alone (Potter and Held 2002). Adult Japanese beetles feed on foliage, flowers, and fruits.
Pupation usually occurs near the soil surface, and takes one to three weeks. Adult Japanese beetle, Popillia japonica Newman, feeding damage on soybean leaves. Fleming WE. Photograph by Ariane McCorquodale, UF/IFAS Entomology and Nematology, DPM. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. 1991. Wear rubber gloves and do not spill any of the insecticide solution on your skin and clothes. Indians. It was accidentally introduced into the United States from Japan about 1916, probably as larvae in the soil around imported plants. If there are bronzed or dry grass areas on your lawn, they are a clear indicator of having these pests there. The legs and head are black. It did not become established in the Detroit area until the early 1970s. The most favored include apples, cherries, grapes, peaches, plums, blueberries, asparagus, beets, broccoli, rhubarb, snap beans, sweet corn, soybeans, birch, crabapples, hollyhocks, linden, maples, mountain ash, roses and sassafras.  Within 4–6 weeks of breaking hibernation, the larvae will pupate.
A swarm of Japanese beetles can denude a peach tree in 15 minutes, leaving nothing but bare branches and the fruit pits.
Swiss authorities are attempting to eradicate the pest.. Articles from Britannica Encyclopedias for elementary and high school students. Always wear long pants, a long-sleeved shirt, rubber boots and rubber gloves when applying insecticides. Adult beetles feed on the top of the leaf, eating the tissue between the veins, leaving the leaves skeletonized. The grubs dig deeper into the soil to avoid the frost as temperatures drop in the fall.
If adequate moisture is available from rain or irrigation, the grubs will molt to second and then third instars by mid-September. Photo by Dave Shetlar, OSU.
Foliage is skeletonized until there is no leaf tissue remaining between the veins. Beetles typically go through 4 stages of development.
Figure 2. Japanese beetle larvae or grubs are an off-whitish color and resemble an arc shape or the letter “C”. The Japanese beetle, Popillia japonica Newman, is a native of Japan. Females then lay white spherical eggs 2 to 6 inches (5 to 15 cm) deep in the soil. Damage to rose plants is one of the most reviled, yet common encounters homeowners experience with Japanese beetles.
Grass turf damaged by larvae of the Japanese beetle, Popillia japonica Newman. However, if an orchard has a history of problems, use insecticides before the beetles become too abundant, as high aggregations of beetles tend to attract other beetles from afar. Paris, France: European and Mediterranean Plant Protection Organization. On field crops such as squash, floating row covers can be used to exclude the beetles, but this may necessitate hand pollination of flowers. In suburban areas where turf is abundant, most beetles feeding on trees, shrubs, and vines deposit their eggs in the nearby grass (Fleming 1972). 344 pp. Cultural Control: During dry summers, female beetles seek irrigated and low lying areas for oviposition since soil moisture is essential for egg survival and larval development.
Updates? The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. The head is yellowish-brown with strong dark-colored mandibles and the body consists of three thoracic and ten abdominal segments. Annual Review of Entomology 47: 175-205. Early recognition of a grub problem can prevent this kind of damage to the lawn. Japanese beetle larvae can cause serious damage to golf course fairways and occasionally to home lawns. Adult Japanese beetle, Popillia japonica Newman, feeding damage on corn tassel. More northern populations in Massachusetts, New York, Vermont, and New Hampshire have adult emergence from late June to early July. The grubs, which primarily feed on roots of grasses cause considerable damage to pasture, lawn and golf courses. Japanese beetles attack a wide variety of trees, shrubs, and field crops. As the grub feeds on the grass roots, it greatly reduces the ability of grass to take up water to withstand stresses of hot, dry weather, thereby causing it to die off or create brown patches above the soil.
Although traps will collect hundreds of beetles, they may attract beetles from far beyond your yard. Figure 14. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential.
Preventive insecticides with the active ingredients imidacloprid, thiamethoxam or clothianidin should be applied between July 1 and July 15 for optimum control.
This publication printed on: Nov. 12, 2020, Entomology – Insect Biology and Management, NC There are five tufts of white hairs on both sides of the abdomen and a pair of tufts on the end of the abdomen. However, most of the damage to ornamentals and turf grass happens during the spring and fall the second year.
While the larvae of Japanese beetles feed on the roots of many genera of grasses, the adults consume the leaves of a much wider range of hosts, including these common crops: bean, cannabis, strawberry, tomato, pepper, grape, hop, rose, cherry, plum, pear, peach, raspberry, blackberry, corn, pea, okra, and blueberry.
Sex attraction in the Japanese beetle. Its color ranges from pale cream to metallic green depending upon the age. Keep the wind to your back when applying insecticides. 1976. Accumulation of fecal matter in the hindgut may give a grayish to dark appearance to the posterior end. Contact a lawn and ornamental professional for guidance and assistance to control Japanese beetle populations. Test what you know about bugs with this quiz.
They survive best in well-maintained, quality grass as found in home lawns, golf courses, parks, cemeteries, etc. Of the states in the southern region, climatological studies predict that it will establish in all states bordering the Gulf of Mexico (Johnson and Lyon 1991) although the beetle still remains unable to establish in Florida. Curative insecticides containing the active ingredients trichlorfon or carbaryl can be applied from Aug. 15 to Oct. 30 or March 15 to May 30 to reduce turf damage. Non-irrigated turf can tolerate fewer grubs if periods of drought occur in the fall or spring. The activity of the grub ceases around 10°C (50°F) and most larvae overwinter as third instar at a depth of 5 to 15 cm (2 to 6 inches). Unlike the larva, the adult feeds on the flowers, fruit, and foliage of the plant. Figure 11. It was accidentally introduced from Japan into New Jersey in 1916.
Several of the beetle’s natural enemies—species of parasitic wasps and flies that in Japan were found to prey on the larvae—have been imported into the United States, where some of them have become established. The larvae hatch about 10 days later and begin feeding on the grass roots.