The cranberry weevil, Anthonomus musculus Say; the blackheaded fireworm, Rhopobota naevana (Hübner); and the cranberry fruitworm, Acrobasis vaccinii Riley, are major cranberry pests in Québec. Currently the only insecticide registered to control the cranberry weevil in conventional production is Actara® 25WG (thiamethoxam), a neonicotinoid considered extremely toxic to bees.
After reviewing the potential risks the active compound poses to aquatic invertebrates, the Canadian Pest Management Regulatory Agency decided to withdraw thiamethoxam products by 2021. The only two effective registered products available for controlling the blackheaded fireworm and cranberry fruitworm are Altacor® (chlorantraniliprole) and Intrepid® 240 (methoxyfenozide).
Due to the high prevalence of these pests, insecticide treatments are required every year to limit crop damage. Given there are just two products available, farmers are obliged to rotate them over a two-year period. This project’s aim is to evaluate the effectiveness of HARVANTA® 50SL to control these three insect pests, with the goal of providing data to support an URMULE program application.
From 2019 to 2021
Pest, weed, and disease control, Ecosystem protection
This initiative will help Québec growers better control cranberry pests, while protecting beneficial insects.
Ministère de l'Agriculture, des Pêcheries et de l'Alimentation | Quebec Cranberry Growers Association
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
The project was conducted at IRDA’S Organic Agriculture Innovation Platform. Strawberries (Cleary cultivar) were produced in beds covered with black plastic mulch.
Researcher: Carl Boivin
The data generated by this project was used to develop a new NPK fertilization chart that reflects technical, agronomic, and environmental issues.
Researcher: Christine Landry