Tag Archives: Downy Mildew

Downy Mildew Identified on Hemp (Cannabis sativa) in Southwestern Ontario

By: Amy Fang Shi, Sean Westerveld, Jim Todd and Melanie Filotas Downy mildew of hemp (also known as cannabis downy mildew) has been identified in multiple hemp fields in southwestern Ontario. The disease first appeared in early September and was … Continue reading

Posted in Industrial Hemp | Tagged , , , , , , , | 1 Comment

Presidio Fungicide Registered for Basil, Hops and Edible-Podded Beans

By: J. Chaput, OMAFRA, Minor Use Coordinator, Guelph The Pest Management Regulatory Agency (PMRA) recently announced the approval of URMULE registrations for Presidio Fungicide for control of downy mildew on field and greenhouse basil and downy mildew of hops, and … Continue reading

Posted in Culinary, Herbs, Hops, Hops Pest Management, Specialty Vegetable Pest Management, Specialty Vegetables | Tagged , , , , , | Leave a comment

Hop Leaf Stripping in Ontario

Leaf stripping (removing lower leaves and laterals; Figure 1) to increase air flow is a common cultural practice to manage hops downy mildew (P. humuli). Leaf stripping is performed earlier in Ontario than in other growing regions due to a shorter … Continue reading

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2018 Downy Mildew Control Strategy for Cucumber Crops — ONvegetables

Specialty cucurbit growers may be interested in the following InfoSheet on downy mildew control strategies in cucumber crops written by Elaine Roddy, OMAFRA Vegetable Crops Specialist.  Note that not all products registered on cucumber for downy mildew are registered on all … Continue reading

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Continue managing late season downy mildew in hops

As most growers are aware, downy mildew is extremely active in Ontario hops this year due to the ideal conditions for development of the disease.  For new growers, an article on identifying symptoms of this disease can be found in … Continue reading

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Using Ridomil for early season hop downy mildew control

With recent warm weather, hops are starting to emerge in many parts of the province, and growers are thinking about early season downy mildew control.  What follows are some answers to questions we often receive about using Ridomil in Ontario … Continue reading

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