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Downy Mildew: signs and treatment in Jamaica
A water mold causing severe foliar blighting, thriving in cool, damp, humid conditions. PlantArmor's crop guides list downy mildew as a common problem on cucumber and watermelon.
Signs to look for
- Angular yellow spots on upper leaf surface
- Purplish-gray fuzz on the underside of leaves
- Rapid leaf browning and death
What to do
Crops it affects
Questions growers ask
How do I recognise downy mildew?
A water mold causing severe foliar blighting, thriving in cool, damp, humid conditions. The signs to look for: Angular yellow spots on upper leaf surface. Purplish-gray fuzz on the underside of leaves. Rapid leaf browning and death.
What should I do about downy mildew?
Use resistant varieties. Apply specialized fungicides (e.g., Zampro, Revus). Do not water from above late in the day. Always read the product label and observe the registered rate, re-entry period and pre-harvest interval before you apply any pesticide.
Which crops are affected by downy mildew in Jamaica?
PlantArmor's crop guides list downy mildew as a common problem on cucumber and watermelon.
Check it in the field
PlantArmor's reference library works offline, so you can compare what you are seeing against it standing in the plot, then log the spray you use along with its re-entry and pre-harvest intervals. Free to use.
This description and treatment come from the same reference library the PlantArmor app uses in the field. Pesticide registrations and permitted uses change — always read the current product label and observe the stated rate, re-entry period and pre-harvest interval.