white fungus on Apple mint leaves

Question

I would like to know what the white fungus on my apple mint plant is and is it harmful?

Answer 1

The fungus is most likely powdery mildew, a disease that attacks mint from time to time. It is best not to eat the affected leaves, but unaffected leaves on the same plant are fine to eat. Here is more information:

https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
http://ipm.uconn.edu/documents/raw2/Powdery%20Mildews%20in%20the%20Greenhouse/Powdery%20Mildews%20in%20the%20Greenhouse2pe.php?aid=238