Spring is the is the time of year oaks are most susceptible to Oak Wilt!

Oak Wilt is a deadly fungal disease that infects and disables the water-conducting system in oak trees. All Oaks are susceptible, but some species more than others. With no known cure, methods to control and treatments are expensive and not guaranteed. Here are some tips from our City Arborist: - Minimize pruning oak trees between Feb. 1 and Jul. 1. This is when the Oak Wilt fungus is most active. - Best time to prune oak trees is either in the middle of the summer, when temperatures are the hottest, or in late fall/early winter months when temperatures can be the coldest. - Paint all cuts and wounds on oak trees within 30 minutes. - Remove Red Oaks identified with Oak Wilt. - Know where your firewood comes from. Don't transport unseasoned firewood from diseased Red Oaks. - Make sure contractors doing tree pruning have a valid, city issued tree maintenance license and proper training. For more information on Oak Wilt, visit us at https://www.sanantonio.gov/DSD/Constructing/Tree#182061934-oak-wilt


Info courtesy of Communications Development Services Department,