By Annshirley10
United Kingdom 
I have a small patio Apple tree but all the leaves are covered by tiny black very soft wormy things what are they? And what can I do about them ? Thank you Shirley They are also ruining the leaves
29 Sep, 2015
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They are fruit slugworms, which are the larvae of a sawfly. Some information in the link below but any good contact insecticide spray should work. Check the label to see what they treat for before buying, and preferably choose something suitable for edible plants.
http://www.gardenseeker.com/plant_pests_problems/plant-pests/fruit_slugworms.htm
29 Sep, 2015