Imported willow leaf beetle damage and adults.  Photo provided by:  David Cappaert, Michigan State University, Bugwood.org

Damage caused by imported willow leaf beetle feeding.  Photo provided by:  Whitney Cranshaw, Colorado State University, Bugwood.org

Imported willow leaf beetle eggs.  Photo provided by:  Whitney Cranshaw, Colorado State University, Bugwood.org

Imported willow leaf beetle larvae feeding on willow leaf.  Photo provided by:  Whitney Cranshaw, Colorado State University, Bugwood.org