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Tuesday - July 03, 2012

From: Boerne, TX
Region: Southwest
Topic: Diseases and Disorders, Pruning, Trees
Title: Time for trimming oaks from Boerne TX
Answered by: Barbara Medford


I want to trim a native red oak but am scared to touch it because I dont want to lose it. It is the primary source of shade in our back yard. Also I want to trim the live oaks and am surrounded with Oak Wilt and Oak Decline. Please tell me when the best time of year is best to do that.


Thank you for asking. The main answer to your question is NOT NOW! Please look at this article from Texas Oak Wilt; in fact, it would be good if you took the time to read all of it, iincluding some videos on treatment and control.

The best thing to do is contact the Forest Service office in your region. Kendall County is in the Kerrville Region:

Kerrville Region – Includes Atascosa, Bandera, Bexar, Edwards, Guadalupe, Karnes, Kendall, Kerr, Medina, Real, Uvalde and Wilson counties.

Mark Duff
Texas Forest Service Project Forester
15110 Jones Maltsberger, Suite 101
San Antonio, TX 78247

Our main advice for right now is to avoid in every way breaking the bark anywhere on any of the trees. This can be caused by being bumped by lawn equipment or digging, even a weedeater can be the culprit. These wounds will cause sap to drip, which is lunch for the Nitidulid Beetle. He does not infect the tree, but if he has already snacked at an infected tree, it's very likely that he has the fungus that causes Oak Wilt on his body, and drops it off. Treatment of Oak Wilt is very difficult and expensive. The best course in the treatment of Oak Wilt is prevention-don't let it happen.


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