Maple Tree Rust Spots - Knowledgebase Question

Guelph, On
Question by kmulligan
July 12, 2005
I have a maple tree that is developing rust spots. Apparently this was common city-wide last year. We were asked not to compost these leaves as they had a fungus growing on them. The fungus caused the rust spots. Could you tell me how I can treat this fungus? I'm worried that my trees won't survive.


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Answer from NGA
July 12, 2005

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Unfortunately, I am unable to tell you how to control the fungus without knowing specifically what it is. Since it is apparently an ongoing problem in your area, I would suggest you contact the local authorities (such as the municipal arborist office or a representative of the office asking that you not compost) and ask what they recommend. Your local professional nurseryman may also have suggestions. Good luck with your maples!

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