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Apple Scab

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From: Nancy Creason
City: Champaign, IL
Last year I took in a branch from my crab apple tree, extension diagnosed apple scab but it was too late to treat the tree. So, I am wondering if I should treat with a fungicide this year or wait to see what happens. The tree is quite young, about 5 years old, so it is not yet very thick. I did try to keep the leaves cleared. Please advise. Thanks.

 
Extension Message
From: Sandra Mason
State Master Gardener Coordinator
Champaign/Ford/Iroquois/Vermilion Unit
slmason@illinois.edu
HI Nancy, It all depends. If you happen to know the name of the crabapple you can find out if it is resistant to apple scab. in which case I wouldnt advise spraying. Last year was a bad year for apple scab and even resistant ones got it to some extent. Here is an article I wrote that outlines options beyond that. http://web.extension.uiuc.edu/champaign/homeowners/080410.html hopefully this will help you to decide. Sandy

 
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