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The Plant Disease Information Office

 Sample Submission Information

Plant samples can be submitted in person at our office or by mail.

Plant images can be submitted by email.

Questions or requests for information can be made by phone, email, or in person.

To submit a plant sample, please follow the instructions listed in our Sample Submission Guidelines (PDF format) . Each sample should have an accompanying filled out Sample Submission Form (fillable PDF Format) with as much information as possible.

Contact Information

Dr. Yonghao Li, Plant Pathologist
Phone: (203) 974-8601
Toll Free Phone: 1-877-855-2237

The PDIO is open 8:30 a.m. to 4:30 p.m. Monday - Friday

PDIO Hours of Operation and Holiday List

PDIO Mailing Address:
Plant Disease Information Office
The Connecticut Agricultural Experiment Station
P.O. Box 1106
New Haven, CT 06504
Office Location Address (use this address for UPS and FedEx, as well as to visit):
Plant Disease Information Office
Jenkins-Waggoner Laboratory
The Connecticut Agricultural Experiment Station
123 Huntington Street
New Haven, CT 06511