In the effort to manage the hemlock woolly adelgid in eastern North America, two fly species deployed as biological control agents are themselves targeted by parasitoid wasps. A new study examines how these parasitoids affect the flies and other predators of the hemlock pests.
A simple tent equipped with a carefully selected mesh can be a helpful tool in augmentative biological control efforts. With infested fruit placed inside, the mesh keeps pest insects in but allows parasitoids to escape and continue their work as natural enemies of target pests.
In Washington state and British Columbia, Canada, two species of wasps from Asia have been found to be successfully parasitizing the invasive fruit fly spotted-wing drosophila.
A tiny parasitoid wasp species, long considered a generalist with more than 65 different host species, is revealed in a new study to actually comprise at least 16 different species, identical in appearance but genetically distinct.