The larvae are called rookworms, because rooks are said to be particularly fond of them. Adults are reddish brown, 1/3” long with black undersides and wing covers cloaked in thick, yellowish hairs. Rose Chafers People often believe, mistakenly, that Rose Chafers–shown here–are actually Japanese Beetles, not realizing that they are different insects.. They live in the soil for about three years eating plant roots. These beetle-like bugs are very common. M. subspinosus occurs from Eastern Canada to Colorado and is considered a pest of many crops and flowers. They can skeletonize the leaves of your plants quickly and thoroughly. The adults feed on flowers, particularly Dog Roses, during the summer and autumn, and can be spotted in warm, sunny weather. The rose-chafer beetle is common in Central and Southern Europe where Jung’s home town of Zurich, Switzerland, is located. They especially like cereal crops and grasses and can do a great deal of damage. They are about half an inch long with a mossy or brownish green color, and although they are known to destroy rose petals, we more often find them munching on our beautiful petunia displays. Rose chafers are scarab beetles approximately 3/8 inch long, slender, and light tan in color. The Rose Chafer … The larvae are small white grubs. The larvae feed on the roots of grasses and non-crop plants. Rose chafer adults typically begin to appear around this time of year in Wisconsin. They can be seen in … They do not cause damage to home lawns or landscape plants. They grow all summer and then, go deep into the soil for resting for winter. Adults prefer a menu that includes shrubbery, flowers and the foliage. The larvae feed on decaying leaves, plants and roots, living in the soil for several years as they develop. Rose Chafer larvae are equally adept at destroying plant life, including grass. Pest: Rose Chafer. The Rose chafer is a large, broad beetle that is found in grassland, scrub and along woodland edges. Cetonia aurata, called the rose chafer or the green rose chafer, is a beetle, 20 millimetres (3 ⁄ 4 in) long, that has a metallic structurally coloured green and a distinct V-shaped scutellum.The scutellum is the small V-shaped area between the wing cases; it may show several small, irregular, white lines and marks. Unlike European chafer beetle grubs, rose chafer grubs do not harm turf grassroots. In this article we will specifically discuss rose chafer as a pest of grape vines in the state; however, they feed on and can be a pest of many fruit crops in the state, including apple, cherry, raspberry, and strawberry. They are fat, creamy-white grubs with brown heads. The chubby white grubs attack grass blades from the roots, potentially ruining pristine turf. 1. Macrodactylus subspinosus is a North American beetle of the family Scarabaeidae.The members of this genus are known as "rose chafers", not to be confused with the European "rose chafer", Cetonia aurata. Rose chafer larvae have a brown head and conspicuous legs. Unfortunately they are not friends. The Rose Chafer (Macrodactylus subspinosus (Fabricius)), is a mostly tan-colored scarab beetle about 1/3 to 1/2-inch in length, with long, spiny, reddish-brown legs. Handpick one of the suspect beetles and examine it to confirm you have rose chafers. Fully grown, a rose chafer larva is about 3/4-inch long. The rose chafer, sometimes mistaken for Japanese beetles (which are destructive too) are native to North America and commonly found in the midwest. And light tan in color head and conspicuous legs brown heads, not realizing that they are,. Beetles, not realizing that they are different insects the larvae feed on leaves! 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