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I have a large mature cherry tree that over the past 3 weeks has had its leaves turn from green to yellow and now die off (July). I have not changed any watering patterns. The trunk "crotch" has debris, and small crawly wormy insects. How can I treat? Is it too late? It's a lovely tree, provides great shade and privacy.

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A

It's difficult to diagnose the problem with your cherry tree and the wormy insects may or may not have anything to do with the leaves yellowing and falling off.  As far as treating, first have to make a proper diagnosis.  We will have Master Gardeners on Monday August 25 from 1 pm to 4pm at 2001 South State Rm S1008 hold a plant problem diagnostic clinic who may be able to identify the insects if you bring in a fresh sample.   Also further questioning by Master Gardeners about other conditions may help figure out what the problem is.

If you can't make the clinic, you can send sample directly to the Utah Plant Pest Diagnostic Laboratory.  Follow this link http://utahpests.usu.edu/uppdl/htm/forms to find out more information on submitting samples for proper diagnosis.

Posted on 22 Aug 2008

Maggie Shao
Horticulture Agent, Salt Lake County

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