Plant Diagnostic Lab

We are open! Please read below for more information.
 

UNH Plant Diagnostic Lab Now Accepting Mailed Samples from Within New Hampshire

The UNH Extension Plant Diagnostic Lab is pleased to announce that we can now accept plant diagnostic samples by mail when the samples are collected and shipped from within New Hampshire.

At this time, the lab continues to accept samples from commercial growers, businesses, municipalities, state and federal agencies, and agricultural and natural resources service providers. All samples must be referred by a UNH Extension field or state specialist before they are mailed or delivered to the lab. This referral process helps ensure that the appropriate sample is collected and that the lab is prepared to receive it.

To help samples arrive in suitable condition for diagnosis:

• Collect fresh, representative plant material showing both healthy and affected tissue.
• Place plant material in a sealed plastic bag and package it in a sturdy box.
• Include the completed submission form and referral information, but keep paperwork outside the bag containing the sample.
• Mail samples early in the week to prevent them from remaining in transit over a weekend.
• Do not mail loose soil or unusually large samples unless requested by the lab.

Please note that samples must originate within New Hampshire. The lab is awaiting the necessary federal permit to receive potentially infected plant material from outside the state and cannot accept out-of-state mailed samples at this time.

Before mailing a sample, contact your UNH Extension field or state specialist for a referral and current submission instructions. Questions may be directed to the Plant Diagnostic Lab at unh.pdl@unh.edu or 603-862-3043.

We appreciate your patience as we continue restoring and expanding the Plant Diagnostic Lab’s services.

For in-person assistance, Plant Diagnostic Lab staff are available on Mondays, Tuesdays, and Thursdays from 10:00 a.m. to 3:00 p.m.
 

Samples may be dropped off at any time during regular business hours, Monday through Friday, from 8:00 a.m. to 5:00 p.m. If you are dropping off a sample outside of in-person assistance hours, please place your sample, completed submission form/referral, and payment in the labeled blue bin located outside Room 206 of Barton Hall on the Durham campus.
 

Diagnostic Tests Offered:

Regular Diagnosis -  $20

Molecular Diagnosis -  $60

Fungicide Resistance Screening - $60
Pond/Irrigation Water Testing for Phytophthora capsici  - $60


 *Home gardeners may submit plant disease images via the UNH Extension Education Center’s online webform here.
For assistance, call 1-877-398-4769.

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