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May 24, 2018 1:15 PM CST
Thread OP
London uk
Pests on local tree in south England
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May 24, 2018 1:43 PM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
Butterflies Birds Enjoys or suffers cold winters Garden Sages Plant Identifier
They are called galls, growths of plant tissue. They can be caused by various insects/mites. Knowing what kind of tree it is would help with a more specific answer
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