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spots on apple tree leaves

My apple trees have had spots on the leaves and the fruit for the past 3 years. What do I need to do to remedy this problem?
Submitted by BHGPhotoContest

The spots on your apple tree are likely from apple scab (although if they are yellowish, they might be rust fungus). In either case, a regular fungicide spray program beginning just before blossom time in spring can prevent development of these diseases. Usually you need to spray every 10 days or so through the spring and summer.

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