Holly Bushes

Holly Bush Disease

Anonymous added on June 26, 2011 | Answered

The huge holly bush in my neighbor's yard is covered with a white fungus or larvae on the leaves. As this overhangs the fence between us, I am concerned it will drop and infect my plants. The lady gardener says it is not white fly.

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Certified GKH Gardening Expert
Answered on June 27, 2011

Are the areas powdery in nature? If so you are dealing with powdery mildew. Here is an article that you may find helpful: https://www.gardeningknowhow.com/problems/get-the-cure-for-powdery-mildew.htm

If not, it could be scale or mealybugs, both of which could be treated with neem oil (as can powdery mildew). I have found it to be very effective against these pests. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

For additional information on scale bugs, which commonly affect these plants, here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm

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