Ontario Reports Downy Mildew On Cucumber And Cantaloupe

Jun 29, 2017

By Mary Hausbeck

Michigan cucurbit growers should protect their crops from downy mildew.

Downy mildew has been reported in Essex County in Ontario, Canada, putting the pathogen within easy striking distance of Michigan’s cucurbit crops. This pattern of downy mildew being detected in our immediate region around the time of July 4, 2017, has become well-established.

Ontario Reports Downy Mildew On Cucumber And Cantaloupe

Downy mildew symptoms on cucumber.

If fungicide sprays have not been applied to the most susceptible crops including cucumbers, cantaloupe and watermelon, this is an appropriate time to begin a fungicide program (see table below). For downy mildew symptoms on other cucurbit crops, see our tip sheet, “Monitoring and Managing Cucurbit Downy Mildew.”

Spore trapping for the pathogen has been ongoing in Michigan and downy mildew spores have not been found in significant numbers. This information is posted and updated each day and can be viewed at MSU’s Downy Mildew News.

Reports of downy mildew have increased across many counties in the southeastern U.S. in the last 10 days. States with the disease include Georgia, North Carolina, Alabama, Florida, South Carolina and Texas. In the northeastern U.S., downy mildew has been reported in Maryland. You can view confirmed outbreaks across the U.S. at the Cucurbit Downy Mildew Forecasting website.

Preferred downy mildew fungicides
Product	Active ingredient	FRAC	Comments (maximum applications per season)
Orondis Opti*	oxathiapiprolin/ chlorothalonil	45/ M05	Make no more than two sequential applications before rotating to a fungicide with a different mode of action (FRAC). Use either soil applications of Orondis or foliar applications of Orondis Opti A, but not both for disease control. Do not use for more than one-third of the total foliar fungicide applications. (6)
Ranman 4SC*	cyazofamid	21	Mix with chlorothalonil or mancozeb. (6)
Gavel 75DF	mancozeb/ zoxamide	M03/ 22	Mix with chlorothalonil or other downy mildew fungicide. (8)
Zampro 4.4SC	ametoctradin/ dimethomorph	45/40	Mix with chlorothalonil or mancozeb. Labeled for application via drip as a foliar spray. (4)
Zing! SC	zoxamide/ chlorothalonil	22/ M05	Mix with mancozeb or other downy mildew fungicide. (8)

*Orondis Opti and Ranman have performed exceptionally well in Michigan trials.

Source: msu.edu

Video: Why Port Infrastructure is Key to Growing Canada's Farms and Economy

Grain Farmers of Ontario (GFO) knows that strong, modern port infrastructure is vital to the success of Canada’s agriculture. When our ports grow, Ontario grain farmers and Canadian farms grow too—and when we grow, Canada grows.

In this video, we highlight the importance of investing in port infrastructure and how these investments are key to growing Ontario agriculture and supporting global trade. The footage showcases the strength of both Ontario’s farming landscapes and vital port operations, including some key visuals from HOPA Ports, which we are grateful to use in this project.

Ontario’s grain farmers rely on efficient, sustainable ports and seaway systems to move grain to markets around the world. Port investments are crucial to increasing market access, driving economic growth, and ensuring food security for all Canadians.

Why Port Infrastructure Matters:

Investing in Ports = Investing in Farms: Modernized ports support the export of Canadian grain, driving growth in agriculture.

Sustainable Growth: Learn how stronger ports reduce environmental impact while boosting economic stability.

Global Trade Opportunities: Improved port and seaway systems help farmers access new global markets for their grain.

Stronger Communities: Investment in ports means more stable jobs and economic growth for rural communities across Ontario and Canada.

We are proud to support the ongoing investment in port infrastructure and to shine a light on its vital role in feeding the world and securing a prosperous future for Canadian agriculture.

Special thanks to HOPA Ports for providing some of the stunning port footage featured in this video.