See MU publication G 7251 . New foliage is distorted. Foliage may have yellow spots or brown areas. Dead areas may drop out, leaving holes. Carbaryl, chlorpyrifos, and cyfluthrin are labeled for control of this pest.
Cankers become elongated and sunken with ridges of callus tissue.
When branches are girdled, foliage beyond this point will wilt, turn yellow and die. The fungus is most damaging on drought-stressed trees. Maintain tree vigor by deep watering during periods of moisture stress. University Outreach and Extension does not endorse commercial products. Follow the label on all pesticides.