Hemiptera: Psyllidae - plant lice Cacopsylla pruni / Psylla pruni Photographs on Prunus persica, Peach Hosts include: Prunus cerasifera, domestica, padus, persica, spinosa Small and often reddish, upperside bulges, the depression below containg a single flat larva. Can also occur as an elongated swelling containg several larvae along the midrib.

Cacopsylla pruni
Holton Lee, Dorset. October 2017