What are these spots?

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audreyannewert Athol, MA Jul 07, 2009

Every year most of the trees in my yard get these spots. What are they and how do I avoid them? These leaves were taken from Maple, Crab Apple and Apple trees. I live in central ma. Thanks for any help.

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suunto Sinks Grove, WV Jul 07, 2009

There may be more than one culprit at work here; one possibility is bacterial leaf spot - see http://tinyurl.com/lof9ws for an image - or galls caused by a very small fly in the family Cecidomyiidae - see http://tinyurl.com/l229yu for an example.

Post #6789116
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audreyannewert Athol, MA Jul 07, 2009

Is there anything that I can do to prevent it (bacterial leaf spot)?

Post #6790340
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suunto Sinks Grove, WV Jul 08, 2009

See http://tinyurl.com/ltzqx3 for some control suggestions.

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