Fletcher scale and eggs. Photo by: Tracy Wooten, Sussex County Extension Agent-Horticulture, University of Delaware.
Lecanium scale (Fletcher scale) on bald cypress. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Lecanium scale on oak. Photo by: Andrew J. Boone, South Carolina Forestry Commission, Bugwood.org.
Both pictures above could be caused by Spiny witchhazel aphid or psyllids on river birch. Photos by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Close-up of ash rust. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.
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.
Salt damage on Taxus along sidewalk. Photo by: Joseph LaForest, University of Georgia, Bugwood.org.
Salt damage on a sugar maple. Photo found at: http://www.umass.edu/urbantree/factsheets/18roadsalttrees.html.
Azalea bark scale. Photo by: Clemson University – USDA Cooperative Extension Slide Series, , Bugwood.org.
Azalea bark scale. Photo by: United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org.
Azalea leafminer. Photo by: Natasha Wright, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Whitefly on azalea. Photo taken by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.