Moth eggs on twisted willow
In our old house our twisted willow was infested each year by caterpillers that we think turned out to be of the tiger moth. We moved house and planted the tree in the ground and until this year we were pest-free.....
This evening I belatedly spotted clear evidence of another attack, with eggs, holes in leaves and some caterpillers already hatched.
My husband wants to spray the tree but I don't think our mainstream greenfly bug spray will help, especially as the eggs have been laid already.
Is there anything we can do, apart from trying to pick eggs and bugs off each leaf? It's a reasonable size tree now and that would take forever, though I'm happy to try to relocate the caterpillers at least.