A native insect that damages a wide variety of trees and shrubs, particularly cedar, juniper and arborvitae. Adult moths are 3/4" inch long and black. The larvae are enclosed in silken bags, 1-2" in length, and covered with plant parts. (Late Spring

A native insect that damages a wide variety of trees and shrubs, particularly cedar, juniper and arborvitae. Adult moths are 3/4" inch long and black. The larvae are enclosed in silken bags, 1-2" in length, and covered with plant parts. (Late Spring

Most pines and spruces grown under stressed conditions are susceptible to attack. The three common Ips species each attack different tree parts, that is, branches, upper trunk, and lower trunk.

Imported insect that feeds on roots and foliage(leaf margin notching) of broad-leaved evergreens, preferably Azaleas, Yews and Rhododendron. Adults are 3/8" long, black weevils with faint yellow flecks. (Late Spring)

Insect that feeds on American boxwood, causing terminal leaves to be cupped and stunted. Adults are about 1/8" inch long and resemble tiny cicadas. Insects usually found inside cupped terminal leaves.

Many forest and shade trees are attacked by these native cankerworms. Apple, elm, oak, hickory, linden, birch, beech, and maple are preferred.

Imported pest often kills eastern or Canadian hemlock by feeding on needles and subsequent needle drop. Adult females are conspicuous because of white fluffy wax covering on twigs.(Early Spring-Fall).

Many types of spider mites infest both deciduous and evergreen landscape plants and are not readily visible without magnification. Look for early signs of stippling on needles and leaves, along with general discoloration.

This moth larvae feeds on a number of plant species, but prefers wild cherry and ornamental fruit trees. Caterpillars have one stripe down back and construct silken webs in branch forks. (Mid-Late Spring)

This is a fungal disease that slowly progresses from a foliar to a systemic infection and proves fatal to native dogwood species. Symptoms include brown nectoric areas along mid-veins, leaves held through winter, and water sprouts. Advanced signs include die-back and tree decline.

Apple scab is a fungal disease that attacks the foliage of apple trees and related species. Leaves exhibit brown necrotic areas that gradually enlarge and cause premature leaf drop, defoliating a large portion of canopy. Repeated infections lead to a general weakening of tree.

This is a systemic fungal disease that infects a wide variety of trees and shrubs and causes visible cankers and limb die-back.

This systemic fungal disease is most often seen on the Leyland Cypress. Infected trees exhibit spots of exuding sap along trunk. Advanced signs include individual branch die-back and tree decline.

Look for: Elm leaf margins exhibit browning and yellow halo.

A number of fungi actively attack trees and can cause structural failure