Q.Camelia leaves turned grey and powdery
How do you treat this problem?

Downtoearthdigs
Answered on May 19, 2019
This can usually be corrected with neem oil, or peroxide, as long as it is just surface damage from powdery mildew. If the leaves are turning necrotic, then it is likely a more vigorous infection that will not be cured.
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
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