Powdery Mildew in Courgette (Zucchini)
Courgettes are fast-growing, prolific vegetables that can produce abundantly from a single plant. A fungal disease that coats leaves, stems, and buds with a white or grey powdery substance. It rarely kills plants but weakens them significantly.
Courgette (Zucchini) care requirements
These care conditions are most relevant to powdery mildew in Courgette (Zucchini). Check each one as a potential cause.
Symptoms to look for in Courgette (Zucchini)
White, powdery coating on leaves, often starting on older leaves near the base of the plant and spreading upward.
Common causes in Courgette (Zucchini)
Courgette's large, dense leaves easily trap humidity around the base of the plant, and powdery mildew thrives in exactly these still, humid conditions, especially later in the season as plants become bushier.
How to diagnose powdery mildew in Courgette (Zucchini)
The white powdery coating is distinctive — unlike downy mildew, powdery mildew sits on the upper surface of leaves and can be rubbed off with a finger.
How to treat powdery mildew in Courgette (Zucchini)
Remove and destroy heavily affected leaves, improve airflow by thinning excess foliage, and apply a fungicide or a diluted milk spray if the infection is spreading.
Preventing powdery mildew in Courgette (Zucchini)
Space plants well for airflow, water at the soil level rather than overhead, and choose powdery-mildew-resistant varieties where available.