Resources

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…

A number of sawfly species are important defoliating pests of ornamental trees in New Hampshire. The damage is done by the larvae which are…

County 4-H Record Books County 4-H Record Cloverbud County 4-H Record Ages 8-10 County 4-H Record Ages 11-13 County 4-H Record Ages 14 -…

There are two families of ticks, the Ixodidae (hard ticks) and Argasidae (soft ticks). Those of importance to hikers, campers, and pet owners are in…

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

In appearance, scales in general show little resemblance to typical insects. They are well protected by the waxy, almost impermeable shell they live…

Most spruce trees are damaged by one of two species of adelgids: the Eastern spruce gall adelgid (Adelges abietis) and the Cooley spruce gall adelgid…

Powdery mildew occurs most commonly on the cool-season grasses such as bluegrasses and fescues, especially in shaded areas or areas with poor air…

Sclerotinia dollar spot is a fungal disease that affects most of the coolseason grasses such as bluegrass, ryegrass, fescue and bentgrass. The…

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

The bluegrass billbug (Sphenophorus parvulus) was first reported in the United States almost 100 years ago in Nebraska. Since then, it has become a…

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…

Fungal leaf spots caused by Dreschslera spp. are common on bluegrass, bentgrasses, fescues, and ryegrasses. Leaf spot symptoms on bentgrass (…

Hairy chinch bugs, (Blissus leucopterus), are probably the most destructive pest of home lawns. The adults are small (1/16" long), black with…

Rhizoctonia brown patch is a common fungal disease of all turf grasses. Symptoms vary depending upon the grass species and mowing height. In general…

Sod webworms are the caterpillar stage of small moths, from the genera Crambus and Herpetogramma. Adult moths are about 1" long, tan-colored,…

Several species of spider mites invade field, garden, greenhouse, nursery, and ornamental plants. The most troublesome of these spider mites is the…

White grubs are the larval or grub stage of several species of beetles and chafers. The two most troublesome species in New Hampshire are the…

The white pine weevil (Pissodes strobi) is one of the most destructive insect pests of eastern white pines in North America. Norway spruce, jack pine…

Corn earworm, Fall armyworm, and European corn borer caterpillars can all infest the ears of sweet corn. The most reliable way to identify them is to…