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!

 

Alaska

 

Cooperative Extension Service, University of Alaska

P.O. Box 75-8155

1000 University Ave

Fairbanks, AK 99775

Michele Hebert – 907-474-2423

 

Alabama        

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

 

Arkansas        

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        

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 

California Department of Food and Agriculture

Plant Pest Diagnostics Center

3294 Meadowview Road

Sacramento, CA 95832

Attn: Diagnostics

Timothy Tidwell – 916-262-1100

 

Colorado       

Colorado State University

E215 Plant Sciences Building

Fort Collins, CO 80523-1177

Tamla Blunt – 970-491-6950

 

Connecticut       

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

Sharon.Douglas@ct.gov

 

Yonghao Li

Same as above

P: 203-974-8601

Yonghao.Li@ct.gov

 

Delaware        

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

 

Florida        

UF Plant Diagnostic Center

 

Building 1291, 2570 Hull Road

 

University of Florida

 

Gainesville FL 32611-0830

 

(PO Box 110830)

 

Phone: 352-392-1795

pdc@ifas.ufl.edu

http://plantpath.ifas.ufl.edu/clinic

 

Georgia        

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

 

Hawaii         

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        

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

 

Iowa         

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

http://clinic.ipm.iastate.edu

 

Illinois        

(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

 

Indiana         

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

http://www.ppdl.purdue.edu/

 

Kansas        

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

 

Kentucky        

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        

Louisiana State University

302, Life Sciences Bldg.

Baton Rouge, LA 70803

Phone: 225-578-4562                   Fax: 225-578-1415

 

Massachusetts       

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

 

Maryland       

Karen Rane

Plant Diagnostic Laboratory, University of Maryland

4112 Plant Sciences Building

College Park, MD 20742

Phone: 301-405-1611       Fax: 301-314-9290

rane@umd.edu

 

David Clement

Maryland Home & Garden Information Center

12005 Homewood Road

Ellicott City, MD 21042

Phone: 410-531-5556       Fax: 401-531-5567

Clement@umd.edu

 

Maine        

Bruce Watt

Pest Management Office, University of Maine

491 College Ave.

Orono, ME 04473-1295

Phone: 207-581-3883       Fax: 207-581-3881

bwatt@umext.maine.edu

 

Michigan         

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

http://www.pestid.msu.edu/

 

Minnesota       

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                          

Email: pdc@umn.edu

http://pdc.umn.edu/

Extension Phone line: (612) 624–4771

http://www.extension.umn.edu/gardeninfo

 

Missouri       

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        

Mississippi State Plant Pathology Lab                   

MES, Box 9655

Mississippi State, MS 39762

Phone: 662-325-2146

http://www.extensionplantclinics.msstate.edu/

 

Montana        

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

 

North Carolina       

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       

North Dakota State University

NDSU Plant Diagnostic Lab

306 Walster Hall

Fargo, ND 58102

Phone: (701) 231-7854

Email: ndsu.pdl@ndsu.edu

 

Nebraska        

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

 

New Hampshire         

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

cheryl.smith@unh.edu

 

New Jersey        

Rich Buckley

Plant Diagnostic Laboratory, Rutgers University

P.O. Box 550

Milltown, NJ 08850

Phone: 732-932-9140       Fax: 732-932-1270

clinic@aesop.rutgers.edu

 

Sabrina Tirpak

Same as above

tirpak@njaes.rutgers.edu

 

New Mexico       

New Mexico State, Plant Diagnostic Clinic NMSU-CES

Box 30003, MSC 3AE

Las Cruces, NM 88003

Natalie Goldberg, Jason French – 575-646-1965

 

Nevada        

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

 

New York        

Sandra Jensen

Cornell Plant Disease Diagnostic Clinic

334 Plant Science Building

Ithaca, NY 14853

P: 607-255-7860

slj2@cornell.edu

 

Insect Diagnostic Laboratory
Cornell University
Dept. of Entomology
2144 Comstock Hall
Ithaca, NY 14853-2601
IDLDiagnosticLab@cornell.edu
Insect Diagnostic Laboratory
Cornell University
Dept. of Entomology
2144 Comstock Hall
Ithaca, NY 14853-2601

Insect Diagnostic Laboratory

Cornell University

Dept. of Entomology

2144 Comstock Hall

Ithaca, NY 14853-2601

IDLDiagnosticLab@cornell.edu

 

Long Island Hort. Research & Exten. Center

3059 Sound Ave

Riverhead, NY 11901

P: 631-727-3595 F: 631-727-361

Margery Daughtrey

mld9@cornell.edu

 

Meg McGrath

Address same as above

P: 631-727-3595

mtm3@cornell.edu

 

Laura Hunsberger

Address same as above

lkh47@cornell.edu

 

Ohio       

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

http://ppdc.osu.edu/

 

Oklahoma       

Oklahoma State University

Entomology & Plant Pathology

127 Noble Research Center

Oklahoma State University

Stillwater, OK 74078-3033

Rick Grantham – 405-744-9417

 

Oregon       

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

 

Pennsylvania        

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

 

Rhode Island         

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

hhf@uri.edu

 

South Carolina        

Plant Problem Clinic

Clemson University

511 Westinghouse Rd.

Pendleton, SC 29670

Phone: 864-656-2677       Fax: 864-646-2137

 

South Dakota        

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

 

Tennessee        

UT Agricultural Extension Service

University of Tennessee

5201 Marchant Drive

Nashville, TN 37211-5201

Phone: 615-835-4572       Fax: 615-832-0043

 

Texas        

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

http://plantclinic.tamu.edu/

 

Utah        

Utah State University

5305 Old Main Hill

Logan, UT 84322

Ryan Davis, Entomology

Phone: 435-797-2435

 

Virginia        

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

 

Vermont       

Ann Hazelrigg

University of Vermont

Jeffords Hall, 63 Carrigan Drive

Burlington, VT 05405

P: 802-656-0493 F: 802-656-4656

ann.hazelrigg@uvm.edu

 

Washington       

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://pddc.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

 

Wyoming      

University of Wyoming

1000 E. University Ave.

Laramie, WY 82071

Gary Franc – 307-766-2397

 

CANADA           

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         

http://www.guelphlabservices.com/           

 

National Plant Diagnostic Network (NPDN) website Laboratories (listed by State at bottom of page)