New bodyguards in Salix short rotation coppice: how can the effect of parasitoids be maximized?

This project aims at investigating how biotic (linked to Salix genotype) and abiotic (linked to climate) factors set the ecological borders for the parasitoid Perilitus brevicollis (Hymenoptera: Braconidae), which is a key species in the biological control of the Salix pest herbivore Phratora vulgatissima.

Salix genotype may affect the parasitoid either directly, through the release of attractive or repellent odors, or indirectly, by reducing or increasing the suitability of Phratora as a host. In experimental studies we will rear Phratora on different Salix genotypes and see how parasitoid development and selectivity is affected. Using bioassays and GC-EAD with collected Salix odours we will also investigate which Salix genotypes that release the more attractive odors.

Climate factors such as increased temperature affect Phratora consumption rate and, thus, nourishment of the developing parasitoid larva inside Phratora. We will manipulate temperature and see how this factor interacts with Salix genotype to influence parasitoid survival and development

Persons involved:

Johan A. Stenberg

Main financing:

Formas

Publications