Maple Tree Leaves Turning Black
Noticed maples leaves turning black last year. It was healthy in the spring and deteriorated there after. The top 1/3 looks like the photos included. The tree is in Muskegon County, Michigan and is about 10 years old. It is 12-14 feet tall and really hasn't thrived at all. What is the cause of the leaves turning black and what measures should be taken?
Muskegon County Michigan
I can identify what appears to be anthracnose in your photos. To explain quickly it is a condition brought on by the heavy spring rains we’ve been suffering through tjis spring. This fungus follows leaf margins and veins of the leaves. Normally newly emerged foliage is affected. Normally we do not treat healthy trees with this condition as they can withstand this damage without long term effects and possibly even push out new leaves. Application of chemicals to slow the fungus’ spread are sometimes called for with show trees or extreme cases. As mentioned above, sanitation is always a good thing when you are dealing with fungal induced leaf drop so keep the leaves picked up and disposed of.