Purpose of the Plant Diagnostic Laboratory
Established in 1979, the University of Maryland Plant Diagnostic Laboratory (PDL) provides plant problem diagnosis in support of Maryland Cooperative Extension programs in agriculture and horticulture. Since 2002, the lab has also been an active participant in the National Plant Diagnostic Network, which links together land-grant university plant diagnostic laboratories for the
purpose of rapid detection of exotic and invasive plant pest species which pose a threat to US agriculture. Laboratory staff also conduct educational programs on plant pathology topics for various audiences, and prepare fact sheets and other materials related to plant disease management.
Who may submit samples?
All Maryland residents may submit samples to the lab. Priority is placed on specimens from Cooperative Extension educators, commercial growers and industry professionals. Home gardeners should work with the Home and Garden Information Center to solve landscape problems; telephone 1-800-342-2507 or visit their website at
http://www.hgic.umd.edu
What Services are provided?
The laboratory provides plant problem diagnosis for all crops. Most diagnoses are based on microscopic examination of the specimen and visual identification or culture of plant pathogens such as fungi, bacteria and nematodes. Identifications of plants, insects and mites attacking plants are also performed. Some specimens are referred to specialists in other departments or other institutions for diagnosis. Samples requiring nematode analysis are submitted to the Plant Nematology Laboratory (http://www.nematology.umd.edu) which is located next to the PDL.
Where is the Laboratory?
The laboratory is located in the Department of Entomology, Room 3171 Plant Sciences building. The telephone is 301-405-1611, FAX 301-314-9290. Email Karen Rane at rane@umd.edu.
How to submit samples
Obtain a copy of the appropriate Specimen Submission Form from the pull-down list at the top of the page. Forms require Adobe Acrobat Reader available at http://www.adobe.com. Fill it out as completely as possible - an accurate diagnosis depends on adequate information. Photos or digital images of the site are also helpful. Plant samples should show a range of symptom development - completely dead tissue is not suitable for diagnosis. Send samples as soon as possible after collecting - store in a cool place if shipment must be delayed. Send samples in a crush-proof container, using next-day or 2nd day carriers, with weekday delivery.