{The Plant Disease Information Office}

The Plant Disease Information Office (PDIO) is part of the Department of Plant Pathology and Ecology of The Connecticut Agricultural Experiment Station.  Dr. Sharon M. Douglas, Plant Pathologist and Head of this Department (Phone 203.974.8496, Email, oversees these service efforts.  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.

A brochure about the Department of Plant Pathology and Ecology is available (346 kb, 2 pages, PDF format*).

Dr. Yonghao Li, plant pathologist, ( is responsible for the office with the assistance of Ms. Mary K. Inman, horticultural technician, (

***PLEASE NOTE: The Plant Disease Information Office has been temporarily relocated to Jones Auditorium due to the renovation of Jenkins Laboratory.  Jones Auditorium is located directly across from Jenkins and is accessible to all by elevator and stairway.  Office hours are Monday-Friday, 8:30 a.m.- 4:30 p.m.  If you have any questions, please call 203.974.8601 or 203.974.8606. Thank you for your patience.***

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


{Boxwood blight leaf spots}


February 2014

-New Fact Sheets-

Two new fact sheets with color photos by Dr. Yonghao Li are now available from the following links and on the Publications page.  They are Anthracnose of Cucumber (3 pages, 158 kb, PDF Format*) and Botrytis Blight of Herbaceous Ornamentals (3 pages, 189 kb, PDF Format*).

  --For Children--

Coloring and Activity Books

The Experiment Station's Coloring and Activity Books for Kids are now available online in the Publications section of this PDIO website.  These books highlight many topics of plants and agriculture in Connecticut and the activities of Station scientists.  The newest edition, Coloring and Activity Book for Kids III (2011) (599 kb, 10 pages, PDF format*), is now available.  It was edited and prepared by Dr. Sharon M. Douglas.


--Archived Disease Alerts--

Disease Alert- Begin to Scout for Downy Mildew of Impatiens (July 2013)

Disease Alert- Late Blight Reported in MA: Scout for Late Blight of Tomato and Potato (July 2013)

Disease Alert- Downy Mildew of Impatiens (August 2012)

Disease Alert- Late Blight of Tomato and Potato (June 2012)




Presentation from the CTPA Summer Meeting 2013 by Bob Marra titled Tropical Storms, Hurricanes, and "Superstorms": Impacts and Influence on Tree Diseases  (5,348 kb, 83 pages, PDF format*).


Newly revised and updated presentation by Sandy Anagnostakis titled Growing Chestnuts in the Northeast (6128 kb, 48 pages, PDF format*).

Some previously posted presentations from meetings are archived and can be accessed by clicking here.


20 February 2014 (updated)

*NOTE: Some of these documents are provided in Adobe® Acrobat™ (.pdf) format. If you do not have Adobe® Acrobat™ Reader to view and/or  print your these documents,  you will need to download the Adobe® Acrobat™ Reader. To get a free copy of the software, click the "Get Acrobat" image. 
{Adobe Acrobat Reader}


Content Last Modified on 2/26/2014 11:01:38 AM