Determination of the toxicity of Pseudomonas protegens CHA0 to Drosophila suzukii (Spotted Winged Drosophila) larvae through oral inoculation

Pseudomonas spp. are beneficial plant microbes with known insecticidal properties. Drosophila suzukii (Spotted Wing Drosophila) is an introduced agricultural pest that is particularly problematic for berries and soft skinned fruits in North America. Although chemical pesticides currently exist, there is a need for more effective and specific methods of combating D. suzukii. Currently, SWD populations are managed with a combination of chemical pesticides and cultural control strategies. However, chemical pesticides have negative consequences for beneficial insects, namely bees, and can pose a threat to aquatic life. Recently, research into pest management has shifted towards the use of bioagents to control agricultural pests as an alternative to harmful chemical pesticides. Our study tested the effect of oral inoculation of D. suzukii larvae with Pseudomonas protegens CHA0. We found that oral inoculation of larvae with P. protegens may be associated with increased mortality and fewer larvae developing into adults.