OnVegetables publishes a weekly crop report for the Ontario region. Downy mildew and Phytophthora on cucurbits are discussed in the recent report.
“Downy mildew continues to circulate in many parts of Southwestern Ontario, and in American states around the Great Lakes.”
Clockwise from top left: underside of cucumber leaf showing dark cucurbit downy mildew (cdm) sporangia – Simcoe 21 July, intermediate cdm symptoms – Canborough 17 July, Cucumber beetle on pumpkin flower, Ridgetown July 17, advanced cdm on pickling cucumber -Canborough 17 July.
