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Flowering Pear trees. I have some mature "Chanticleer" flowering pears. For the last 2 years, the new foliage has emerged with curled leaves and a white, cottony substance. This condition seems to lessen with the hot weather, but the foliage doesn't seem to totally look healthy like when the trees were younger. What is it and can it be treated?
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Difficult to diagnose with just that description. It could be powdery mildew from infected buds that infects newly emerging leaves.
Here is a description from PNW Online Plant Disease Management. Go to http://plant-disease.ippc.orst.edu/disease.cfm?RecordID=806 and see if this is what you have.
We also have Plant Pest Diagnostic Ask a Master Gardener clinics in Salt Lake County every Monday from 1 to 4pm for the months of June, July and August in our USU Training Room, 2001 South State RM S1008. You can bring in photos or samples of your plants and have volunteer Master Gardeners help advise you.
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