Oak wilt is a fungal disease that is lethal to many oaks.
Routine pruning of dead or dying branches can be done at any time.
Tree Trimming in Fall Fall is, in general, the worst time to trim a tree. Cuts take longer to heal during this time period because the tree is going into dormancy and when trees with fungal diseases release large numbers of spores after being cut, the increased risk of infection from the released sports increases. May 22, Many people believe the spring is a bad time, or summer is a bad time.