The adult lays eggs on rolled margins of the young leaves. Eggs hatch with in a few days and larvae feed on the upper epidermis, causing leaves to be tightly rolled. Fully grown larvae drop to the ground and pupate in the soil in a silken cocoon. After two weeks adults emerge, mate and lay eggs (Barnes, 1948).

- Lakmali Amarawardana, David Hall, Jerry Cross: (2007) Investigations on the sex pheromone of pear leaf midge, Dasineura pyri (Bouché), and other gall midge pests of fruit crops^©

Reference: http://www.iobc-wprs.org/pub/bulletins/iobc-wprs_bulletin_2007_30_04.pdf#page=185