D. rosae

D. rosae, commonly known as the rose gall wasp, is a species of gall wasp in the family Cynipidae. This insect is known for inducing the formation of galls on rose plants, particularly on the wild rose species.

Description

The adult D. rosae is a small wasp, typically measuring around 4-5 mm in length. It has a black body with reddish-brown legs and antennae. The wings are transparent with a slight iridescence.

Life Cycle

D. rosae undergoes a complex life cycle that includes both sexual and asexual reproduction. The female wasp lays eggs in the developing buds of rose plants. The larvae that hatch from these eggs secrete chemicals that manipulate the plant's growth, causing it to form a gall. These galls provide both food and protection for the developing larvae.

Gall Formation

The galls induced by D. rosae are often spherical and can vary in size. They are typically green or reddish and can be found on the stems or leaves of the host plant. The galls are composed of plant tissue that has been altered by the chemicals secreted by the larvae.

Host Plants

D. rosae primarily targets species within the genus Rosa, including the dog rose (Rosa canina) and other wild roses. The relationship between the wasp and its host plant is a form of parasitism, where the wasp benefits at the expense of the plant.

Distribution

D. rosae is found throughout Europe and parts of Asia. It has also been introduced to North America, where it has established populations in various regions.

Ecological Impact

The galls formed by D. rosae can have various effects on the host plant. While they generally do not kill the plant, they can reduce its overall vigor and reproductive success. The galls also provide a microhabitat for other organisms, including predators and parasitoids of the wasp larvae.

Related Species

D. rosae is part of a larger group of gall-inducing wasps within the family Cynipidae. Other related species include Andricus kollari and Biorhiza pallida, which induce galls on oak trees.

See Also

• Gall wasp
• Cynipidae
• Rosa
• Parasitism