Flower plants - Knowledgebase Question

San Francisco, Ca
Question by alamedaney
August 22, 2009
Lately my flower plants leaves shows a snow like colors. What's the best thing to do ?


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Answer from NGA
August 22, 2009

0

What you describe sounds like the fungal disease powdery mildew. 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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