Powdery Mildew in Giant Inula; Magnificent Inula
A stately perennial with large coarse leaves and massive golden-yellow daisy-like flowers up to 4 inches across blooming on tall sturdy stems. A fungal disease that coats leaves, stems, and buds with a white or grey powdery substance. It rarely kills plants but weakens them significantly.
Giant Inula; Magnificent Inula care requirements
These care conditions are most relevant to powdery mildew in Giant Inula; Magnificent Inula. Check each one as a potential cause.
Symptoms to look for in Giant Inula; Magnificent Inula
- fiber_manual_recordWhite or grey powdery coating on leaf surfaces
- fiber_manual_recordAffected leaves yellowing and curling
- fiber_manual_recordDistorted or stunted new growth
- fiber_manual_recordPowdery patches on stems and flower buds
Common causes in Giant Inula; Magnificent Inula
- fiber_manual_recordHigh humidity combined with poor air circulation
- fiber_manual_recordOvercrowded planting conditions
- fiber_manual_recordWarm days and cool nights
- fiber_manual_recordExcessive nitrogen fertilisation promoting soft growth
- fiber_manual_recordWater-stressed plants are more susceptible
How to diagnose powdery mildew in Giant Inula; Magnificent Inula
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 Giant Inula; Magnificent Inula
Remove and dispose of affected leaves. Spray with a diluted solution of baking soda (1 tsp per litre of water) or neem oil. Ensure good air circulation around the plant. In severe cases, use a fungicide labelled for powdery mildew.
Preventing powdery mildew in Giant Inula; Magnificent Inula
Space plants adequately for air flow. Avoid overhead watering. Do not over-fertilise with nitrogen. Water in the morning so foliage dries before evening.