Bugs in my daisies? - Knowledgebase Question

North Hollywood, Ca
Question by tinabadger
March 17, 2010
I have a bush that is daisies (not sure exactly what the name is) recently I have noticed a white coating on the leaves. It looks almost like someone has rinsed a paint brush out overtop of the plant. Any thought on what is causing this?

Answer from NGA
March 17, 2010


What you describe sounds like a fungal disease called powdery mildew rather than an insect population. To reduce additional infections, avoid overhead watering to help reduce the relative humidity. Remove and destroy all infected plant parts (leaves, etc.). Selectively prune overcrowded plant material to help increase air circulation. This helps reduce relative humidity and infection. If cultural controls fail to prevent disease buildup, or if the disease pressure is too great, an application of a fungicide may be necessary. These include: sulfur, neem oil (Rose Defense, Shield-All, Triact), triforine (Ortho Funginex), or potassium bicarbonate (Kaligreen, First Step) Chemicals are most effective when combined with cultural controls. Best wishes with your landscape!

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