Rosa-acicularis
Guides
Diplolepis rosaefolii
Diplolepis rosaefolii is a gall wasp in the family Cynipidae that induces distinctive lenticular (lens-shaped) galls on the leaves of rose plants across Canada. The species exhibits an alternation of generations life cycle typical of cynipid wasps, with a bisexual spring generation producing the visible galls and an agamic (asexual) winter generation of wingless females. In Ontario and Quebec, it is primarily associated with native Rosa acicularis, though populations have been documented on the cultivated hybrid rugosa shrub rose 'Thérèse Bugnet'. The galls support a diverse component community including multiple parasitoid wasp species and inquilines.