Natural enemy diversity, a potential for effective control of spotted wing drosophila

Thème:
Espèces nuisibles et pesticides
Quoi:
Talk
Quand:
vendredi 20 déc. 02:55 PM (15 minutes)
Où:
Salle CD
Discussion:
0

The Spotted Wing Drosophila (SWD), Drosophila suzukii Matsumura (Diptera: Drosophilidae), is a major pest of strawberry, raspberry and blueberry crops in Quebec. Synthetic insecticides are currently the main control method used against this pest. In this study, we first evaluate the potential for individual biological control of parasitoid wasps and predators to reduce SWD populations in the laboratory. In a second step, we determine several combinations of effective natural enemies using a substitutive design in which the density of natural enemies is held constant as the number of species increases. The tests were conducted for 15 days in experimental arenas in laboratory with SWD females and raspberries, allowing the availability of all life stages of SWD for each of the natural enemies' combinations. The results showed a reduction of SWD populations by 36% to 70% after 15 days. This study establishes several natural enemy combinations with potential for effective control of Spotted Wing Drosophila.


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