Category: Landscape Plant Pests

Aphids, or plant lice, feed on most vegetable crops, many house plants and ornamentals grown in New Hampshire, as well as numerous weeds and wild plan...

In late spring and early summer, there are several species of adult beetles in the home landscapes of New Hampshire, attacking prized ornamental trees...

Although there are plenty of references on insect pests, there are relatively few references that feature beneficial insects. I wrote this publication...

There are between 10 and 20 thousand species of insects in New Hampshire, so identifying an insect, spider or tick is often the crucial first step tow...

The birch leaf miner (Fenusa pusilla) feeds primarily upon three host plants: gray birch, paper birch, and European white birch. This European native ...

The bronze birch borer (Agrilus anxius) is found throughout the birch range in the U.S. and Canada. It attacks and breeds in paper birch, yellow birch...

The spring cankerworm (Paleacrita vernata) and the fall cankerworm (Alsophila pometaria) are native pests to the deciduous forest, shade, and ornament...

Dutch elm disease is caused by two closely related fungi, Ophiostoma ulmi or O. novo-ulmi. The fungi are spread from tree to tree by elm bark beetles ...

The fall webworm (Hyphantria cunea) and the Eastern tent caterpillar (Malacosoma americanum) feed on fruit, shade, and woodland trees. They are of lit...

Fire blight, caused by the bacterium Erwinia amylovora, is found to some extent almost every year in New Hampshire and other major apple and pear grow...