The spotted wing drosophila (SWD) is a particularly challenging pest for berry growers due to its high egg-laying potential and end-of-season population explosion (near harvest time). Insecticides have limited ability to reach the larvae, which are buried inside the fruit. In Québec, the battle against SWD generally involves repeated and alternating applications of insecticides that are also toxic to pollinators and, in some cases, pose significant risks to human health and the environment. In organic crops it is possible to utilize up to three treatments of Entrust, but there is a risk of resistance developing. To reduce the phytosanitary impact of drosophila in berry crops, IRDA proposes to assess the complementarity of commercial predators. The three selected predators (Orius insidiosius, Chrysoperla carnea and Dicyphus hesperus) have demonstrated their effectiveness in eating spotted wing drosophila eggs in laboratory studies. Three treatments involving the release of predators in combination will be compared to a control group in a randomized complete block design tested in an organic day-neutral strawberry crop. Fruit infestations and saleable fruit percentages will be assessed and compared for each treatment.
From 2020 to 2022
Pest, weed, and disease control, Organic farming
This project will allow us to learn more about the effectiveness of various predator combinations in controlling spotted wing drosophilia.
Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec
This project will modify current protocols with the addition of labile carbon to preserve or rapidly restore the activity of beneficial microorganisms.
Researcher: Christine Landry
The aim of this project was to field-test sound irrigation practices and band application of various types of fertilizers at ridging time to eliminate fertigation and increase the efficiency of fertilizer and water use under plastic mulch.
This project assesse the influence of biotic and abiotic factors on the efficacy of spring flooding to developp a strategy of control for the blackheaded fireworm
Researcher: Daniel Cormier