The European Chafer Beetle is an invasive insect pest. Insecticides containing the active ingredients imidacloprid, thiamethoxam, clothianidin or chlorantraniliprole are very effective against grubs when applied in June to mid-July. Adult beetles emerge from the soil between mid June and early July in Michigan and New York, though emergence times vary and depend on temperature. European Chafer Beetle Family Name Scarabaeidae Species A. majale. Contact the MDA via Arrest the Pest if you suspect an infestation of European chafer in Minnesota. The European chafer is a very serious grub pest of turf and can cause more turf damage than the Japanese beetle. It is significantly more cold-hardy which allows it to feed later into the fall and start feeding earlier in the spring compared to Japanese beetle and masked chafer grubs. But because they are so substantial, they make an ideal source of protein for birds and mammals. European chafer adults feed very little on foliage and are not a problem. Larvae have the typical C-shaped appearance of white grubs and can range from ¼-inch to 1-inch long with a dark brown head and conspicuous legs. European chafer beetle was discovered in the U.S. in 1940, in a nursery near Rochester, New York. Extensive, but patchy damage to winter wheat caused by European chafer grubs. Eggs are laid two to four inches below the soil surface and hatch in early August. Spring grub control can be difficult to achieve and the only realistic chemical options are trichlorfon or carbaryl. Adult European chafer beetles are tan in color and resemble a small June beetle. Repair damaged turf by re-sowing with grass seed or laying turf in mid to late spring when the chafer grubs have moved deeper into the soil to pupate Less heavily managed lawns are thought to be more susceptible to damage, so attention paid to feeding, watering and moss prevention may help avoid damaging populations The larvae (or grubs) have brown heads and white, C-shaped bodies, and they’re smaller than a dime. confused with the European chafer beetle larvae or adults: NATIVE BEETLES • Ten-lined June beetle (Polyphylla decemlineata) can often be found in sandy soils in British Columbia. An invasive turf pest, the European Chafer Beetle was first discovered in the Lower Mainland in 2001 and has continued to spread into surrounding communities, including Surrey. When these beetle species has infested your lawn, the grasses would appear spongy and even wilted. Grubs overwinter just below frozen soil and return to the surface as soon as the ground thaws. Home lawns, golf courses, and turf growers have the potential to be most significantly impacted if the European chafer beetle were to become established in Minnesota. The biggest problem causing the most visual damage is the fact that crows, skunks, and raccoons will tear apart what remains of your lawn in order to feast on this delicacy. In the larval stage, the chafer can cause some damage to lawns resulting in brown patches. According to the Minnesota Department of Agriculture, the European chafer beetle (Amphimallon majale) can be more destructive to lawns than Japanese beetles because it has a longer feeding season as a grub. Setting a beetle trap or even applying the pesticide nematode on the grass are few treatment measures undertaken to control the European chafer beetle numbers. In Michigan, the European chafer is now common through most of the Lower Peninsula. Infested lawns may feel "spongy" due to the grubs tunnelling below. The grubs may be distinguished from other white grubs through characteristics of the posterior of the abdomen, but an experienced entomologist may be needed. Keep records of any European chafer infestation in order to identify areas to keep an eye on going forward. Visit the University of Minnesota website for information about diagnosing and managing problems with lawns and turf. When the grubs are ready to pupate in late spring to early summer, the grubs will again descend lower in the soil. It has been reported in New York, New Jersey, Connecticut, Pennsylvania, Massachusetts, Rhode Island, Ohio, Michigan, Delaware and southern Ontario. 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