Female holly bush has lots of new growth, plenty of berries, but many leaves have 1/16 inch x 1/4 inch white powdery strips on the underside. What is this and how can I get rid of it?
Holly Bush White
Certified GKH Gardening Expert
Powdery mildew is caused by fungus that attack Holly leaves, sometimes covering them entirely with a thin white powdery coating. For more information, here is an article that you may find helpful: https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm