Help! I have a garden full of native beech trees, and over the last week or so I have an infestation of web like cocoons covering my trees and tree shoots. These do no spread from branch to branch as in tent caterpillars, or tree web worms, but completely wrap around a single branch or a small tree shoot, starting at the ground and forming a conical web around it.
This is then full of small black 1 inch worms that grow into cream coloured caterpillars. I have one which stands from the ground, about 3 feet tall. How do I get rid of this. Please help.