Powdery mildew - Knowledgebase Question

Brandon, Fl
Question by jimmyzline
April 20, 2010
I have a few tropical plants (Kafir lilly and Amaryllis) that have some white powdery mildew (I think) on them. Will this go away by itself or do I need to get rid of it?

Answer from NGA
April 20, 2010


Powdery mildew can spread through the spores that are found on the leaf surfaces so either prune off the affected leaves to stop the spread, or use a fungicide on the plants. There are many fungicides available. Check the label to be sure they are safe and effective on the type of plant that is infected. Look for ingredients such as: potassium bicarbonate, neem oil, sulfur or copper. There are also chemical fungicides, such as triforine, that can be used on ornamental plants. Good luck with your plants.

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