Vol 103 (2006)

Journal of the Entomological Society of British Columbia

Cover Page

COVER: Mastrus ridibundus (Gravenhorst) (Hymenoptera: Ichneumonidae)

Mastrus ridibundus was introduced into the United States from its native Kazakhstan for classical biological control of codling moth. This gregarious ectoparasitoid specializes on cocooned codling moth larvae, homing in on semiochemical cues from the silk of newly spun cocoons. Females paralyze the host and deposit between 1-7 eggs within the host cocoon. Parasitoid larvae consume the host before spinning their own cocoons within their host’s empty cocoon.

Photograph details: Female Mastrus ridibundus, ovipositing in a cocoon of its host, Cydia pomonella. Photo taken with a digital camera through a dissecting microscope (16×) by Zaid Jumean, Department of Biological Sciences, Simon Fraser University.