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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comWhat is the best control of powdery mildew on potted petunias in greenhouse
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1 Comment To "best control of powdery mildew in greenhouse"
#1 Comment By BushDoctor On 02/04/2018 @ 4:12 pm
I prefer neem oil, as long as you do not apply it is direct sunslight. This will take care of the issue quickly. An alternative would be to spray with a mix of one part peroxide, and three parts water.
Here is an article that will give you many other ways to control insects, fungal/bacterial infections, and many other ways to make these yourself: https://www.gardeningknowhow.com/special/organic/ [1]