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Downy Mildew in Courgette (Zucchini)
How to identify and treat downy mildew in Courgette (Zucchini).
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Courgette (Zucchini) care requirements
water
Deeply and regularly. Mulch to retain moisture.
soil
Rich, well-draining soil with compost.
light
Full sun.
symptoms
Symptoms to look for in Courgette (Zucchini)
Yellow, angular patches on the upper leaf surface bounded by leaf veins, with a greyish fuzzy growth visible underneath in humid conditions.
help
Common causes in Courgette (Zucchini)
Downy mildew spreads rapidly in humid conditions with wet foliage, and courgette's large, dense leaf canopy can create exactly this humid microclimate if plants are crowded or watered overhead.
healing
How to treat downy mildew in Courgette (Zucchini)
Remove and destroy affected leaves promptly, improve airflow by spacing or thinning growth, and apply a fungicide labelled for downy mildew if spreading rapidly.
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Preventing downy mildew in Courgette (Zucchini)
Water at the soil level rather than overhead, space plants for good airflow, and choose downy-mildew-resistant varieties where available.