Larvae hibernate in the soil, transform to pupae in the spring, and begin emerging as adults in early June. Two generations are produced annually, the second occurring in mid-August. Mine in bramble leaf caused by blackberry leafminer. When fully grown, the larva usually folds over a part of a leaf, forming a cavity in which it pupates.
Moths appear about two weeks later.
Hind wings are ash brown. Group of leaves tied together by raspberry leafroller. This is not a common pest in Ohio, but it does occur at times in low numbers. Larvae are light green and marked by conspicuous bristles, which arise from small swellings on the body. In the course of their development, they consume the leaf tissue, and a heavy infestation may result in loss of the crop.