Important Reminder
Many common plant problems can be identified through the exchange of digital images / video so we strongly encourage our member gardens to engage their diagnosticians via email prior to submitting a physical sample. They will provide guidance on what type of documentation would be most useful and whether or not a physical sample is necessary for identification.
You can find contact information for your state's diagnostic lab below.
That said, please complete this webform whenever and whereever you are submitting a sample for diagnosis so that we can document the contribution that public gardens are making to our knowledge about plant pests and diseases. When you submit the webform, a packing slip will automatically be generated and emailed to you. Please print this packing slip and attach it to your lab's sample submission form and include both when sending in your sample. The sample submission forms vary from sate to state but you can use the following directory to find yours!
NPDN Diagnostic Lab Contact Information
Click on the abbreviation for your state to be taken directly to that entry.
AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY; Canada
Or explore NPDN's Homepage here!
Cooperative Extension Service, University of Alaska
P.O. Box 75-8155
1000 University Ave
Fairbanks, AK 99775
Michele Hebert – 907-474-2423
Auburn University
ALFA Agricultural Services Bldg
961 South Donahue Dr.
Auburn University
Auburn, AL 36849
Phone:334-844-5507
Plant Diagnostic Lab
C. Beaty Hanna Horticulture and Environment Center
2612 Lane Park Rd.
Birmingham, AL 35223
Phone:205-879-6564
University of Arkansas Plant Health Clinic
University of Arkansas 2601 N. Young Ave.
Fayetteville, AR 72704
Phone: 479-575-2727 (office); 479-575-3189 (lab)
Contact: Sherrie Smith
Email: ssmith@uaex.edu
http://plantpathology.uark.edu/2547.htm
Arizona Department of Agriculture
State Agricultural Laboratory
2422 West Holly St.
Phoenix, AZ 85009
Dave Mills – 602-744-4915
Maricopa Agricultural Center, University of Arizona
7860 W. Smith-Enke Road
Maricopa, AZ 85239
insects, urban ecology
Dawn Gouge – 520-381-2223
University of Arizona, Tucson
1140 E. South Campus Drive
Forbes Room 204
Tucson, AZ 85721
fungi, bacteria, nematodes, viruses
Mary Olsen – 520-626-2681
Ursula Schuch – 520-621-1060
viruses
Zhongguo Xiong – 520-621-9869
fungi
Barry Pryor – 520-626-5312
1140 E. South Campus Drive
Forbes Room 303
Tucson, AZ 85721
viruses, vector biology
Judith Brown – 520-621-1402
nematodes
Mike McClure – 520-621-7161
1140 E. South Campus Drive
Forbes Room 410
Tucson, AZ 85721
insects
Carl Olson – 520-621-5925
Yuma Mesa Agricultural Center
2186 W. County 15th Street
Somerton, AZ 85350
fungi, bacteria, viruses, nematodes
Mike Matheron – 928-782-5863
Yuma Valley Agricultural Center
6425 W. 8th Street
Yuma, AZ 85364
insects
John Palumbo – 928-782-3836
California Department of Food and Agriculture
Plant Pest Diagnostics Center
3294 Meadowview Road
Sacramento, CA 95832
Attn: Diagnostics
Timothy Tidwell – 916-262-1100
Colorado State University
E215 Plant Sciences Building
Fort Collins, CO 80523-1177
Tamla Blunt – 970-491-6950
Joan Allen
Home & Garden Education Center
Dept. of Plant Science, University of Connecticut
1380 Storrs Rd. U-4115
Storrs, CT 06269-4115
P: 860-486-6740 F: 806-486-6338
joan.allen@uconn.edu
Sharon M. Douglas
CT Agricultural Experiment Station
123 Huntington Street, P. O. Box 1106
New Haven, CT 06504-1106
P: 203-974-8496 F: 203-974-8502
Yonghao Li
Same as above
P: 203-974-8601
Yonghao.Li@ct.gov
Nancy Gregory
Plant and Soil Science Dept., U. of Delaware
151 Townsend Hall,
Newark, DE 19717-1303
P: 302-831-1390 F: 302-831-0605
ngregory@udel.edu
UF Plant Diagnostic Center
Building 1291, 2570 Hull Road
University of Florida
Gainesville FL 32611-0830
(PO Box 110830)
Phone: 352-392-1795
http://plantpath.ifas.ufl.edu/clinic
UGA-Plant Pathology Dept.
University of Georgia
Rural Development Center
P.O. Box 1209
Tifton, GA 31793-1209
Phone: 229-386-7495 Fax: 229-386-7415
College of Tropical Agriculture and Human Resources
Agricultural Diagnostic Service Center – Entomology
3050 Maile Way
Honolulu, HI 96822
Dick Tsuda – 808-956-6742
Agricultural Diagnostic Service Center – Hilo
Komohana Research and Extension Center
875 Komohana St.
Hilo, HI 96720
Brian Bushe – 808-969-5211
Agricultural Diagnostic Services Center – Manoa
College of Tropical Agriculture and Human Resources
1910 East-West Road, Sherman 124
Honolulu, HI 96822
Attn: Desmond Ogata – 808-956-8053
Hawaii Department of Agriculture – Entomology
1428 S. King St.
Honolulu, HI 96814
Bernarr Kumashiro, Insect Taxonomist
808-973-9534
Hawaii Department of Agriculture – Plant Pathology
1428 S. King St.
Honolulu, HI 9681
Mann Ko – 808-973-9547
University of Hawaii, Plant Bacteriology Lab
3190 Maile Way
Honolulu, HI 96822
Anne Alvarez, Asoka de Silva – 808-956-8054
Wendy Kaneshiro – 807-956-7764
Idaho Department of Agriculture, Plant Pathology Lab
2230 Old Penitentiary Rd
Boise, ID 83712
Liz Vavricka – 208-332-8640
Idaho State Department of Agriculture, Plant Industry Division/Entomology
2270 Old Penitentiary Rd.
Boise, ID 83712
Ben Simko, Entomologist – 208-332-8620
University of Idaho – Plant Pathology
29603 U of I Lane
Parma, ID 83660
Krishna Mohan, Ramaiah Sampangi – 208-722-6701
Plant and Insect Diagnostic Clinic
Department of Plant Pathology
327 Bessey Hall
Iowa State University
Ames, IA 50011
Phone: (515) 294–0581 Fax: (515) 294–9420
Contact: Laura Jesse
Email: sickplant@iastate.edu
(May–Sept) Plant Clinic
1401 W. St. Mary’s Road
University of Illinois
Urbana, IL 61801
Phone: (217) 333-0519
Contact: Suzanne Bissonnette or Stephanie Porter
Email: sbissonn@illinois.eduor satterle@illinois.edu
http://plantclinic.cropsci.illinois.edu/
(Sept–Apr) S-420 or S-424 Turner Hall
1102 S. Goodwin Avenue
University of Illinois
Urbana, Illinois 61801
Contact: Suzanne Bissonnette
Phone: (217) 333–2478 Fax: (217) 333–5299
Email: sbissonn@illinois.edu
Contact: Stephanie Porter
Phone: (217) 244–3254 Fax: (217) 333–5299
Email: satterle@illinois.edu
Plant and Pest Diagnostic Laboratory
Purdue University
LSPS 101
915 W. State Street
West Lafayette, IN 47907–2054
Phone: (765) 494–7071 Fax: (765) 494–3958
Contact: Tom Creswell or Gail Ruhl
Email: creswell@purdue.eduOR ruhlg@purdue.edu
Plant Disease Diagnostic Lab
4032 Throckmorton PSC
Manhattan, Kansas 66506
Phone: (785) 532-5810 Fax: (785) 532-5692
Email: clinic@ksu.edu
Entomology Diagnostician
Contact: Holly Davis
123 West Waters Hall
Manhattan KS 66506
Phone: (785) 532-4739
Email: gotbugs@ksu.edu
Lexington Lab
Plant Pathology Department
University of Kentucky
210F Plant Science Building
1405 Veterans Drive
Lexington, KY 40546-0312
Phone: 859-257-8949 Fax: 859-323-1961
Princeton Lab
Plant Disease Diagnostic Lab
University of Kentucky Research and Education Center
1205 Hopkinsville Street
Princeton, KY 42445-0469
Phone: 270-365-7541 x228 Fax: 270-365-2667
Louisiana State University
302, Life Sciences Bldg.
Baton Rouge, LA 70803
Phone: 225-578-4562 Fax: 225-578-1415
Rob Wick
Dept. of Plant, Soil & Insect Sciences, UMass
270 Stockbridge Rd, 111 Fernald Hall
Amherst, MA 01003
P: 413-545-1045
rwick@pltpath.umass.ed
M.Bess Dicklow
101 University Drive
Amherst, MA 01003
Phone: 413-545-3209 Fax: 413.545.4385
mbdicklo@umext.umass.edu
Karen Rane
Plant Diagnostic Laboratory, University of Maryland
4112 Plant Sciences Building
College Park, MD 20742
Phone: 301-405-1611 Fax: 301-314-9290
David Clement
Maryland Home & Garden Information Center
12005 Homewood Road
Ellicott City, MD 21042
Phone: 410-531-5556 Fax: 401-531-5567
Bruce Watt
Pest Management Office, University of Maine
491 College Ave.
Orono, ME 04473-1295
Phone: 207-581-3883 Fax: 207-581-3881
Diagnostic Services
101 CIPS
Michigan State University
East Lansing, MI 48824–1311
Contacts:
Jan Byrne, Plant Pathologist (517) 355–3504 or byrnejm@msu.edu
Howard Russell, Entomologist (517) 353–9386 or bugman@msu.edu
Fred Warner, Nematologist (517) 432–1333 or fwnemalb@msu.edu
Fax: (517) 432–0899
Diagnostic Services
Plant Disease Clinic
Department of Plant Pathology
495 Borlaug Hall
1991 Upper Buford Circle
University of Minnesota
St. Paul, MN 55108
Phone: (612) 625–1275 Fax: (612) 625–9728
Contact: Brett Arenz
Extension Phone line: (612) 624–4771
http://www.extension.umn.edu/gardeninfo
Plant Diagnostic Clinic
23 Mumford Hall
University of Missouri
Columbia, MO 65211
Phone: (573) 882–0623 Fax: (573) 884–4288
Contact: Adam Leonberger Email: leonbergera@missouri.edu
Nematology Lab Contact: Robert Heinz Email: Heinzr@missouri.edu
http://plantclinic.missouri.edu/
Mississippi State Plant Pathology Lab
MES, Box 9655
Mississippi State, MS 39762
Phone: 662-325-2146
http://www.extensionplantclinics.msstate.edu/
Montana State University
119 PlantBioScience Bldg.
Bozeman, MT 59717-3150
Linnea Skoglund – 406-994-5150
Ruth O’Neill, Melissa Graves – 406-994-5690
Schutter Diagnostic Lab, Montana State University
121 Plant Bio Science Bldg,
Bozeman, MT 59717-3150
Mary Burrows, Lab Supervisor – 406-994-7766
Plant Disease and Insect Clinic
Campus Box 7211
1104 Williams Hall
100 Derieux Place
North Carolina State University
Raleigh, NC 27695-7211
Phone: 919-515-3619
North Dakota State University
NDSU Plant Diagnostic Lab
306 Walster Hall
Fargo, ND 58102
Phone: (701) 231-7854
Email: ndsu.pdl@ndsu.edu
University of Nebraska-Lincoln
Plant and Pest Diagnostic Clinic
448 Plant Sciences
P.O. Box 830722
Lincoln, NE 68583-0722
Phone: (402) 472-2858 Fax: (402) 472-2853
Cheryl Smith
Plant Diag. Lab. University of New Hampshire,
G37 Spaulding Hall, 38 Academic Way
Durham, NH 03824
Phone: 603-862-3841 Fax: 603-862-2717
Rich Buckley
Plant Diagnostic Laboratory, Rutgers University
P.O. Box 550
Milltown, NJ 08850
Phone: 732-932-9140 Fax: 732-932-1270
Sabrina Tirpak
Same as above
tirpak@njaes.rutgers.edu
New Mexico State, Plant Diagnostic Clinic NMSU-CES
Box 30003, MSC 3AE
Las Cruces, NM 88003
Natalie Goldberg, Jason French – 575-646-1965
Nevada Department of Agriculture – Plant Pathology Lab
405 South 21st Street
Sparks, NV 89431
Shouhua Wang – 775-353-3765
Nevada Department of Agriculture, Entomology Lab
405 South 21st Street
Sparks, NV 89431
Jeff Knight – 775-353-3767
Sandra Jensen
Cornell Plant Disease Diagnostic Clinic
334 Plant Science Building
Ithaca, NY 14853
P: 607-255-7860
Insect Diagnostic Laboratory
Cornell University
Dept. of Entomology
2144 Comstock Hall
Ithaca, NY 14853-2601
Long Island Hort. Research & Exten. Center
3059 Sound Ave
Riverhead, NY 11901
P: 631-727-3595 F: 631-727-361
Margery Daughtrey
Meg McGrath
Address same as above
P: 631-727-3595
Laura Hunsberger
Address same as above
C. Wayne Ellett Plant and Pest Diagnostic Clinic
8995 East Main Street
Plant Industry Building, #23
The Ohio State University
Reynoldsburg, OH 43068
Phone: (614) 292–5006 Fax: (614) 466–9754
Contact: Nancy Taylor
Email: taylor.8@osu.edu or ppdc@postoffice.ag.ohio-state.edu
Oklahoma State University
Entomology & Plant Pathology
127 Noble Research Center
Oklahoma State University
Stillwater, OK 74078-3033
Rick Grantham – 405-744-9417
Oregon Department of Agriculture, Plant Health Lab
635 Capital Street NE
Salem, 97301
Shawn Meng – 503-986-4661
Oregon State University – Plant Clinic
1089 Cordley Hall
2701 SW Campus Way
Corvallis, OR 97331
Melodie Putnam – 541-737-3472
Sara May
Penn State University
220 Buckhout Lab
University Park, PA 16802
P: 814-865-2204 F: 814-863-7217
srm183@psu.edu
Seong-Hwan Kim
Plant Disease Diagnostic Lab
Pennsylvania Department of Agriculture
2301 N Cameron St
Harrisburg, PA 17110
P: 717 772 5224 L: 717 772 5221: F: 717 705 6518
skim@state.pa.us
Heather Faubert
Plant Protection Clinic, U. of Rhode Island
Mallon Outreach Center, 3 E. Alumni Ave.
Kingston, RI 02881
P: 401-874-2967 F: 401-874-2259
Plant Problem Clinic
Clemson University
511 Westinghouse Rd.
Pendleton, SC 29670
Phone: 864-656-2677 Fax: 864-646-2137
Plant Diagnostic Clinic
South Dakota State University
1205 Jackrabbit Drive
Box: 2108
Brookings, SD 57007
Phone: 605.688.5545 Fax: 605.688.4024
Email: SDSU.PDC@sdstate.edu
UT Agricultural Extension Service
University of Tennessee
5201 Marchant Drive
Nashville, TN 37211-5201
Phone: 615-835-4572 Fax: 615-832-0043
Texas Plant Disease Diagnostic Laboratory
Texas A&M University
1500 Research Parkway, Suite A-130
College Station, TX 77845
Phone: 979-845-8032 Fax: 979-845-6499
Email: plantclinic@ag.tamu.edu
Utah State University
5305 Old Main Hill
Logan, UT 84322
Ryan Davis, Entomology
Phone: 435-797-2435
Plant Disease Clinic and Nematode Assay Lab
106 Price Hall
Department of Plant Pathology, Physiology and Weed Science
Virginia Polytechnic and State University
Blacksburg, VA 24061-0331
Phone: 540-231-6758 Fax: 540-231-3221
Ann Hazelrigg
University of Vermont
Jeffords Hall, 63 Carrigan Drive
Burlington, VT 05405
P: 802-656-0493 F: 802-656-4656
Washington Department of Agriculture
Pest Program / Plant Protection Division Entomology
P.O. Box 42560
Olympia, WA 98504
Eric LaGasa, Chief Entomologist
Phone: 360-902-2063
Washington Depart. of Agriculture – Plant Pathology Lab
3939 Cleveland Ave SE
Olympia, WA 98501
Jennifer Falacy
WSU Puyallup Research and Extension Ctr. (western WA)
7612 Pioneer Way East
Puyallup, WA 98371
Jenny Glass
WSU Plant & Pest Diagnostic eNetwork (eastern WA)
P.O. Box 646430
Pullman, WA 99164-6430
Karen F. Ward
Phone: 509-335-3292
Wisconsin
Plant Disease Diagnostics Clinic
Department of Plant Pathology
1630 Linden Drive
University of Wisconsin-Madison
Madison, WI 53706–1598
Phone: (608) 262–2863 Fax: (608) 263–2626
Contact: Brian Hudelson
Email: bdh@plantpath.wisc.edu
http://www.entomology.wisc.edu/entodiag.html
WEST VIRGINIA
Jennifer Williams
West Virginia University Extension Service
2080 Agricultural Sciences Building
P.O. Box 6108
Morgantown, WV 26506-6108
P: 304-293-6131
JOWilliams@mail.wvu.edu
Berry A. Crutchfield
Pest Identification Laboratory
West Virginia Dept. of Agriculture
1900 Kanawha Blvd. E.
Charleston, WV 25305
P:304-558-2212 F:304-558-2435
bcrutchfield@ag.state.wv.us
University of Wyoming
1000 E. University Ave.
Laramie, WY 82071
Gary Franc – 307-766-2397
Pest Diagnostic Clinic
Laboratory Services
University of Guelph
95 Stone Road West
Guelph, Ontario, Canada N1H 8J7
Phone: (519) 767–6299 Fax: (519) 767–6240
Email: aflinfo@uoguelph.ca
National Plant Diagnostic Network (NPDN) website Laboratories (listed by State at bottom of page)
