Fire Blight Sampling
It is only possible to isolate the bacteria (Erwinia amylovora) from fresh, active lesions, where healthy tissue meets the diseased tissue - the lesion margin.
It is impossible to isolate fire blight bacteria from dead, dried out tissue.
The Lesion Margin
Collect samples that include about 3 inches of healthy tissue beyond the infected tissue, and include about 3 inches of infected tissue. Do not submit all the dead branch of the strike, this is often too long and can be cut back, as described, to 3 inches of infected tissue above 3 inches of healthy tissue.
If possible, refrigerate infected trees and strikes.
Protect samples from drying out prior to submitting them.
Do not collect entire branches or trees unless symptoms are unusual.
Please see the attached form for more information.
Fire Blight Sample Form (pdf; 226KB)
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Upcoming Events
Hudson Valley Orchard Weed Management Meeting
June 25, 2025 : Hudson Valley Orchard Weed Management Meeting
Poughkeepsie, NY
At this meeting, we will discuss previous research on using mulch for weed management, including the benefits of stacking mulch treatments with an organic herbicide program. We will then discuss the treatments in our field trial, discuss results to date, and get initial reactions from the grower, while viewing the field trial. We will then discuss the other study objective, using a mechanical weeding system to replace contact herbicide applications, currently underway in the Champlain Valley.
Workshop: Controlling Listeria in Apple Packinghouses
June 26, 2025 : Workshop: Controlling Listeria in Apple Packinghouses
Highland, NY
Join Cornell University Food Science experts, along with CCE ENYCHP specialists Dan Donahue and Elisabeth Hodgdon for a day-long intensive workshop on managing Listeria in apple packinghouse environments.
2025 Berry Twilight Meetings
July 2, 2025 : Berry Twilight Meeting at Dressel Farms
New Paltz, NY
Join Heather Kase, CCE ENYCHP, and Anna Wallis, Cornell IPM, for seasonal updates on berry pest man-agement and IPM.
July 16, 2025 : Berry Twilight Meeting at Samascott Orchards
Kinderhook, NY
Join Heather Kase, CCE ENYCHP, and Anna Wallis, Cornell IPM, for seasonal updates on berry pest man-agement and IPM.
August 6, 2025 : Berry Twilight Meeting at Fishkill Farms
Hopewell Junction, NY
Join Heather Kase, CCE ENYCHP, and Anna Wallis, Cornell IPM, for seasonal updates on berry pest man-agement and IPM.