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OMAFRA: Apple pest update

July 2, 2020  By Kristy Grigg-McGuffin

Forecasts of high humidity in parts of Ontario create ideal conditions for disease development in apple orchards, according to Ontario’s Ministry of Agriculture, Food and Rural Affairs (OMAFRA) apple pest update.

Kristy Grigg-McGuffin, horticulture IPM specialist with OMAFRA, breaks down what summer diseases to look out for and provides resources for management. Grigg-McGuffin also shares what to look for to spot bitter rot, fly speck and sooty blotch, as well as what can be done to manage fire blight.

Several pests are on the Ontario radar such as, woolly apple aphid, codling moth, European apple sawfly, apple maggot, San Jose scale crawlers and potato leafhopper.


Finally, Grigg-McGuffin informs that growers who suspect herbicide-resistant weeds on the farm can get them tested for free through a genetic sample project. Read the full Apple Pest Update here.


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