Apr 30, According to experts at Michigan State University Extension, the normal time-tested advice to prevent oak wilt is to not prune oaks after April 1, otherwise you risk injuring oaks. While risk of infection decreases after mid-July, it’s prudent to avoid pruning any type of Estimated Reading Time: 4 mins. Apr 07, Homeowners can reduce the risk of oak wilt infections by not pruning or otherwise injuring oaks after April While high risk of infection decreases to lower risk after mid-July, it’s prudent to simply avoid pruning oak trees from just prior to bud break to leaf drop.
This means April to bushcutting.buzzted Reading Time: 3 mins. Sep 26, Oak trees are best trimmed in the winter between November and March. Oak trees are dormant in winter and are less likely to be negatively affected by pruning when in winter dormancy.
That being said, branches which are dead, damaged, or diseased should be removed any time of year (and as soon as possible).Estimated Reading Time: 8 mins. Pruning oak trees in winter greatly reduces the risk of an oak wilt infection as the beetles and fungal mats are not present at that time of year.
If an oak tree must be pruned in spring or summer (such as after a storm), apply latex house paint to the pruning cuts to avoid attracting sap-feeding beetles to the wounds.