Woolly beech aphid infestation. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Woolly beech aphids. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Imported willow leaf beetle larvae. Photo by: Paul Weston, Cornell University, Bugwood.org.

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