Plant guide:ðĨĶ Broccoli
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Fungal
Powdery Mildew on Broccoli
Commonly affects: Brassica oleracea var. italica (Broccoli)
A white powdery coating develops on leaf surfaces, typically later in the season during warm, dry weather with cool nights.
Potential Causes
- 1Fungal spores favoured by warm days and cool, humid nights
- 2Dense plantings restricting airflow
- 3Stressed plants showing increased susceptibility
Solution Steps
- 1Remove heavily affected leaves
- 2Apply a sulphur-based fungicide at first signs
- 3Improve spacing for better airflow
- 4Keep plants consistently watered to reduce stress susceptibility
Prevention Tip
Powdery mildew on broccoli is usually a late-season, cosmetic issue on outer leaves rather than a serious threat to the head.
