The Plant Diagnostic Clinic at the University of Delaware accepts plant samples showing signs or symptoms of disease. The Clinic is housed in the Department of Plant and Soil Sciences at the University of Delaware in Newark , and operates as a function of Delaware Cooperative Extension.

Soybean Rust- 2008 Update USDA ipmPIPE Site Photos of Soybean Rust Get Ready for Spring with General Plant Disease Info General Plant Disease Fact Sheets Chrysanthemum white rust found in Delaware on Oct. 4, 2007  (Photo Above) Chrysanthemum white rust caused by the fungus Puccinia horiana affects cultivated chrysanthemum plants in the Family Asteraceae. The disease is not established in U.S. chrysanthemum production, and could have significant impact. The fungus will not over winter outdoors in Delaware.  The disease may be easily cleaned up when found, but can initiate new infections from stock plants held in greenhouses.  Symptoms include yellow spots on the upper surface of the leaves that are up to 5 mm in size. On the underside of the leaves, raised bumps or pustules develop which have a waxy, warty appearance and are light in color. If you see symptoms of white rust on leaves or flowers of a plant purchased recently in Delaware, please take it to your nearest County Extension Office or contact the Delaware Department of Agriculture, Bureau of Plant Industry. Plants should be destroyed.