Re: Its a bad year for this wild chestnut
Hi Ron,
Nice Horse Chestnut! I think it will be fine. The disease looks to be a rust, and is very common on Aesculus here. They can spray a preventative fungicide in the spring, and then again in the summer, to prevent the rust from forming, but the cost may be too much for a tree that size. Luckily, it is only an aesthetic problem.
Frank
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