Plant Disease & Diagnosis Services

Gibbera twig blight is known to affect blueberries in Merrimack, Sullivan, Cheshire and Grafton counties of New Hampshire. This disease will affect fr...

Black death of hellebore, a virus disease affecting hellebores in nursery and home gardens, was found in a nursery in Grafton County, New Hampshire, i...

In the summer and fall of 2023, blueberry leaf rust was found widely distributed in New Hampshire, including Merrimack, Hillsborough and Strafford cou...

Exobasidium leaf and fruit spot of blueberry is a fungal disease affecting both leaves and berries. Symptoms matching this disease were reported in se...

Leaf spot is one of the important fungal diseases on cherry trees in the United States. The disease mainly affects the leaves; the pathogen will cause...

Several celery samples from high tunnel production with leaf curl have been identified by the UNH Plant Diagnostic Lab; this disease causes significan...

How to package different types of samples (leaves, branches, whole plants), what to include in the package (plant sample, completed form, payment), an...

These pages provide current weather information with downloadable weather graphs.  <br /> <br /> <br /> Belknap County (Moulton Farm)<br /> Carr...

The apple maggot (Rhagoletis pomonella) is one of the most important economic insect pests of apples in New Hampshire. This native insect is also know...

Step by step instructions for submitting a sample to the Plant Diagnostic Lab.