purple passion plant - Knowledgebase Question

Big Bend, Wi
Question by Kaylabear012
February 13, 2011
I have had this purple passion plant for almost 2 years. It was growing beautifully.
But within the past month, these white spots, just about bigger then a pinhead,are appearing on both sides of the leaves and destroying my plant.
HELP!


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Answer from NGA
February 13, 2011

0

What you describe sounds like a fungal disease called 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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