{The Plant Disease Information Office}

The Plant Disease Information Office (PDIO) is part of the Department of Plant Pathology and Ecology at The Connecticut Agricultural Experiment Station (CAES). The PDIO is a full-service plant disease diagnostic laboratory that assists all Connecticut stakeholders, including homeowners and professionals.  Plant samples are diagnosed utilizing molecular, serological, biochemical, and traditional diagnostic methods. The PDIO also assists with inquiries about plants, plant identification, and plant health. Inquiries and samples can be submitted via phone, email, mail, and in person. More information can be found in the Sample Submission section.

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
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
Connecticut Agricultural Experiment Station
123 Huntington Street
New Haven, CT 06511

{Photo of Jenkins-Waggoner Laboratory}

The Experiment Station's PDIO is a member of the National Plant Diagnostics Network (NPDN) and the Northeast Plant Diagnostic Network (NEPDN) 


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{Boxwood Blight}

Content Last Modified on 9/26/2018 10:46:21 AM