Black spot on roses. Photo by: Brian Kunkel, Ornamentals IPM specialist, University of Delaware.
Powdery Mildew on common lilac. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Fire blight on pear. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Elm pouch gall (caused by aphids).
Elm pouch gall (caused by aphids). Photos of elm pouch galls by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Rose slug sawfly feeding damage. Photo by: Tracy Wooten, Sussex County Extension Agent - Horticulture, University of Delaware.
Rose slug sawfly. Photo by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.
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