Question
QUESTION: I have had my blood good for 16 years and for the first time i have had it, it has yellow and brown spots all over the leafs. they are also wilting away and dieing.I work at a nursery and have had multiple customers come up and ask me as well. if you can help me that would be great. I live in New England.

ANSWER: Patrick:
There are a variety of agents that can cause leaf spots. Could you send a photo of these spots? Try to get as close as you can to the leaf to take the shot. Review it on your computer first.. to be sure it is in focus before you send. You know the old saying--- a picture is worth 1,000 words.  I'll be glad to offer you my comments if you care to send along a snapshot.

Regards
Steve

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leaf spots   QUESTION: here you go i hope you can inform me on what it is 3 more customers have ask me about it.

Answer
Patrick:
Thanks for the photo. This is a leaf spot often referred to as maple anthracnose. It is favored by wet weather ,usually in the early spring. The worst effect is leaf drop. It is spread by wind and splashing water.  It is caused by one of two fungal microorganisms-- Kabatiella or Apiognomia. Kabatiella is the most common fungus on japanese maples. Usually anthracnose doesn't have a significant impact on the overall health of an established tree UNLESS it happens over several consecutive years leading to a weak tree. It can be managed well by chemical applications of a fungicide---IF applications begin as soon as the buds start to swell and as leaves start to expand.  It may take 2-4 applications and the chemical must be able to cover the entire tree.  This can be a limitation for the homeowner who may not have a sprayer to cover the entire tree.  If you start spraying later (after leaves come out in the spring), control will not be optimum.  We usually tell folks just to rake up the fallen leaves, especially just before spring starts.  Those infected leaves that are on the ground and those that can hang on the tree can be a source for the disease for the new growing season. As temperatures rise and dry conditions become common, the disease usually subsides.

Regards
Steve