Frozentreehugger
Masterpiece
Don’t let there vulnerability . Hold you back they make great bonsai . My first round at bonsai I lost my real nice collected wild cow chomped apple to borrers May not have been avoidable . But I know. Now I was not pro active enough . You simple need a consistent spray routine . Regular wash the bench with bleach . We have advantages with a tree in pot . You can tent the tree to concentrate fumes . Dunk the whole tree I. Water fir 24 hours . Good routine . It’s a lot easier to spray a bonsai then a tree in your yard . Treat all wounds . Heavily treat all deadwood or large wounds with epoxy . Make it non edible . Just be proactive and diligent