Plant fungus - Knowledgebase Question

houston, Te
Question by beamargstewa
July 3, 2009
What is the best treatment for black spot or powdery mildew on plants or shrubs especially palms trees?

Answer from NGA
July 3, 2009


Black spot typically attacks rose bushes and a neem oil based product called Rose Defense can be used to keep the disease under control. As for your palm tree, the white powder is a fungus called powdery mildew, and that's not good news for your palm! This fungus will be hard to eradicate without stressing the palm; however all you can do is try, so spray the palm with a broad spectrum fungicide, and let the soil dry between waterings. Cut back the dead fronds, and let mother nature take its course.

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