Understanding, Recognizing, and Keeping Hypoxylon Canker of Oaks at Bay
|Part 3. Managing Hypoxylon Canker
Hypoxylon canker, caused by the fungus Biscogniauxia atropunctatum, occurs on trees exposed to stress. Therefore, the disease may be controlled by preventing the stress from occurring and allowing the tree’s natural resistance mechanisms to inhibit the pathogen. If a tree succumbs to stress, then measures
|root zone of the tree (Figure 1). The holes should be 18 – 24” deep and a few inches in diameter.
Fig. 1. Vertical mulching diagram illustrating placement of holes.
Remedial pruning If 15% or less of the canopy is affected, prune out all dead branches. All pruning should be done utilizing proper pruning practices.
Prepared by Sheila McBride1 and David Appel2
Diagnostician, Texas Plant Disease Diagnostic Laboratory1 and Professor in Department Plant Pathology and Microbiology2
Texas AgriLife Extension Service; The Texas A&M University System
May 22, 2009
The information given herein is for educational purposes only. References to commercial products or trade names are made with the understanding that no discrimination is intended and no endorsement by Texas AgriLife Extension Service personnel is implied.
Educational programs of the Texas AgriLife Extension Service are open to all people without regard to race, color, sex, disability, religion, age, or national origin.
The Texas A&M University System, U.S. Department of Agriculture, and the County Commissioners Courts of Texas Cooperating