On-line Greenhouse Scout School

Cornell University is partnering with the University of Vermont and the University of Maine to offer a 6-week webinar series in scouting for disease, insect and weed pests of greenhouse ornamentals, although the principles will apply to other crops. Learn how to identify the major pests of greenhouse floriculture crops, make scouting faster and easier, communicate with growers and owners, and find resources to help. 

Sessions will be led by Stephanie Barnett, Margery Daughtrey, Betsy Lamb, Elise Lobdell, John Sanderson and Cheryl Sullivan.

February 13–March 26

Certificate Program Presentations:
6 -7:30 p.m.

Webinar Series Presentations:
Tuesdays (except March 5) 
6:30-7:30 p.m.

Certificate Program

Earn a certificate demonstrating your knowledge and skills as a greenhouse scout. This option includes all presentations, scouting equipment, electronic resources and discussions with presenters and other students.

Cost: $300

Webinar Series

Choose only the sessions that match your area of interest. 

Cost: $25 per session or $125 for all six sessions. 

Please register at least one day before the webinar, especially if you wish to receive pesticide recertification credits.

Pesticide Recertification Credits

One NYS pesticide recertification credit is available for each webinar in categories 1a, 3a, 3c, 24 and 25. To receive credits, you must be on your own computer or smart device so we can identify who is present. You will also need to send a photo of your pesticide license in advance of the program. More information will be sent upon registration.


Contact Elizabeth Lamb
eml38 [at] cornell.edu (eml38[at]cornell[dot]edu)


February 13

  • Introduction to scouting

  • Identification of

    • fungus gnats, shoreflies, drain flies and their biocontrols

    • root rot diseases

February 20

  • Mechanics of scouting and record keeping

  • Identification of

    • Aphids and their biocontrols

    • Botrytis and other fungal leaf spots and rusts

February 27

  • Scouting resources

  • Identification of

    • Thrips and their biological controls

    • Abiotic disorders

March 5 (certificate students only)

  • Interactive activity – certificate students only

March 12

  • Overview of scouting – patterns and considerations in the greenhouse

  • Identification of

    • Mites and their biological controls

    • Bacterial diseases

March 19

  • Overview of scouting – making scouting easier

  • Identification of

    • Mildews, downy and powdery

    • Whiteflies and their biological controls

March 26

  • Communicating scouting results

  • Identification of

    • Virus diseases

    • Mealybug and scale and their biological controls


Coordinator of the Ornamentals Program of the New York Stay Integrated Pest Management Program since 2005

Emeritus Assistant Professor in the Entomology Department at Cornell University

IPM consultant and scout for 30 years • Runs an independent scouting business – Plant Keepers

Associate Professor of Horticulture, University of Maine

Integrated Pest Management Research Technician at the University of Vermont Entomology Research Laboratory since 2005

Senior Extension Associate, School of Integrative Plant Science Plant Pathology and Plant-Microbe Biology Section at Cornell University