The Nitidulid beetle can transfer spores from an infected Red Oak.

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.

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Apr 13, In general, heavy pruning in spring can limit the tree’s bloom potential for the year, especially if it is a species that blooms on the previous year's growth. But, you can safely do some tree pruning in spring–as long as you don’t remove any more than 10 percent of the tree’s branches.

Pruning wound sealants are not generally recommended for use following pruning, but it is important during the growing season to sanitize pruning tools when moving between trees.

Jan 18, However, pruning Oaks during this time IS safe if the wounds two inches in diameter and larger have a thin coat of wound dressing applied to them as the cuts are made.

We define spring as the time when trees become active- after winter dormancy, and during flowering and re-leafing.