Last year I planted semi-dwarf apple, peach and pear trees. The peach and pear trees are fine. Something is chewing up all the leaves of the apple tree. There is also a white fluffy substance on the branches. I would appreciate help with these problems.
Semi-Dwarf Apple Tree Problems
Certified GKH Gardening Expert
It sounds like you have woolly aphids. This article will help with that: https://www.gardeningknowhow.com/plant-problems/pests/insects/woolly-aphid-control.htm As for the damaged leaves, what does the damage look like? It will help us narrow down which pests it could be and advise on getting rid of it.