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Observed: 3rd August 2013 By: Thistle
Added: 29th October 2013
Something has caused the edges of these Hawthorn leaves to roll up tightly. Looking at the 2012 Plant Gall Checklist, the only species which seems to cause this damage is Phyllocoptes goniothorax. There are other leafrollers of Hawthorn but they seem to form much looser rolls.