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)

Upcoming Events
Leading the Farm Team: Supervisory Skills for New Managers
April 14, 2026 : Session 1: Becoming a Supervisor
The transition from working alongside employees to supervising them can be challenging. This session explores the shift from individual contributor to supervisor and the mindset and skills needed to lead a team effectively. Participants will learn about the role of a supervisor, key leadership behaviors, and how to build trust and credibility with employees.
April 21, 2026 : Session 2: Improving Performance
This session will introduce the performance triad—clear expectations, training, and feedback—to support employee success. We will discuss practical communication strategies, how to give constructive feedback, and how supervisors can help employees improve their performance over time.
April 28, 2026 : Session 3: Managing Conflict
Supervisors are responsible for maintaining a professional and respectful workplace. This session covers some of the legal and ethical responsibilities of supervisors and the responsibilities managers have in addressing workplace concerns.
Participants will also explore common sources of workplace conflict, learn to recognize potential biases that can influence management decisions, and discuss practical approaches for addressing difficult situations and resolving conflicts at work.
