Unlike most insects named after particular plants, the rose chafer doesn’t limit itself to one target. It’s a general pest. The 2 1/2 inch long adults, slender, long legged, and light tan in color, feed in swarms, attacking flowering plants first, then moving on to other kinds of plants. The slim, white, 1/4 inch long grubs damage grass roots the same way Japanese beetle and June beetle grubs do but only in sandy soils.