Magnolia Trees
Q.

powder on jane magnolia leaves

DJ added on October 31, 2013 | Answered

I live in Maryville, TN. and there was a lot of rain this summer. Most of the leaves have fallen off. There is a powder residue on the leaves but looks like new growth is growing.

A.
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Nikki
Certified GKH Gardening Expert
Answered on November 1, 2013

The powdery residue is from a fungal issue called powdery mildew. You can try treating the tree with neem oil, often sold as fruit tree spray in some places. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm

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