Q.weigela with powdery substance
My weigela bush has white powdery substance on some of its branches. I am trimming my well-established weigela bushes after their spring bloom and I noticed this year that the backside of the bushes (next to my front porch) have a white powdery substance on some of the branches. What is it and what can I do to take care of it?
Downtoearthdigs
Answered on July 5, 2016
Your plant has Powdery Mildew. You can use Neem Oil to treat.
Here is a link with more information.
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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