Apple growers apply fungicides every year to control apple scab caused by the fungus Venturia inaequalis. The treatments are repeated at regular intervals based on the risk of infection, the appearance of new leaves, and rain washing off the fungicide. Recommended treatment frequencies are mainly based on empirical criteria that vary considerably among specialists. Yet findings from published studies and other research could greatly improve decision-making on treatment frequencies.
The aim of this project is to determine the combined impact on fungicide efficacy of rain and the appearance of new leaves to more accurately identify how long treatments remain effective. The data generated by this project will be compatible with currently available software i.e., RIMpro and the Agropomme model. The findings will enable more rational use of fungicides during the primary infection period.
From 2017 to 2020
Pest, weed, and disease control
This work will lead to more optimal usage of fungicides.
Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec | RIMpro
Developing and assessing the planting of flower strips in orchard inter-rows as an alternative to the application of insecticides.
In highbush blueberry fields where stunt disease has been detected, plants that have never received nitrogen fertilizer are more vigorous and homogeneous than plants that have received nitrogen fertilizer.
The aim of this project was to test the general hypothesis that exclusion nets, when properly used, can prevent attacks by most apple pests and reduce disease incidence with no major adverse effects on fruit quality.
Researcher: Gérald Chouinard