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Pest Alert Oak Wilt in the Northeastern United States NA-PR-02-17


Oak wilt is a deadly vascular disease caused by a fungus (Ceratocystis fagacearum) that affects all native oak trees. Oaks are common in the Eastern United States and can be found in more mesic sites mixed in with other northern hardwoods such as sugar maple (Acer saccharum) or in drier sites with pines (Pinus spp.). Red oaks (northern red (Quercus rubra), pin (Q. palustris), and scarlet (Q. coccinea)) are more susceptible to oak wilt than white oaks (white (Q. alba), swamp white (Q. bicolor), chestnut (Q. montana), post (Q. stellata), and bur (Q. macrocarpa)).

Pest Alert Browntail Moth NA-PR-04-02


Pest Alert - The browntail moth, Euproctis chrysorrhoea, a native of Europe, was first found in North America in Somerville, Massachusetts, in the spring of 1897. Browntail moth caterpillars feed on leaves of many hardwood trees and shrubs. At high population levels, caterpillars may completely defoliate the host. Common host trees and shrubs include apple, oak, cherry, hawthorn, serviceberry, rugosa rose, and bayberry. Browntail moth caterpillar hairs can cause a skin rash on humans similar to that caused by poison ivy.

Pest Alert Bacterial Leaf Scorch Affects New Jersey State Tree NA-PR-01-00


Pest Alert - Bacterial Leaf Scorch (BLS) of northern red oak is widespread within New Jersey with many communities experiencing a high disease incidence. BLS is considered a threat not only to the state tree, northern red oak, but also to pin and scarlet oaks and other urban trees such as sycamore and elm.

Pest Alert Winter Moth Pest Alert NA–PR–01–12


Winter moth, Operophtera brumata L. (Lepidoptera: Geometridae), is a non-native invasive defoliator from Europe that was discovered in Massachusetts in the late 1990s. Winter moth has now been found throughout the eastern half of Massachusetts and into Rhode Island, Connecticut, Long Island (NY), southeastern New Hampshire, and southeastern Maine. It is expected to continue to spread to suitable habitats.

Pest Alert Asian Longhorned Beetle: A New Introduction NA-PR-01-99GEN


The Asian longhorned beetle (ALB) has been discovered attacking trees in the United States. Tunneling by beetle larvae girdles tree stems and branches. Repeated attacks lead to dieback of the tree crown and, eventually, death of the tree. ALB probably traveled to the United States inside solid wood packing material from China. The beetle has been intercepted at ports and found in warehouses throughout the United States.

Pest Alert Thousand Cankers Disease-Pest Alert, Revised February 2013 NA-PR-02-10


Dieback and mortality of eastern black walnut (Juglans nigra) in several Western States have become more common and severe during the last decade. A tiny bark beetle is creating numerous galleries beneath the bark of affected branches and the main stem, resulting in fungal infection and canker formation. The large numbers of cankers associated with dead branches and the stem suggest the disease's name - thousand cankers disease.

Pest Alert Beech Bark Disease NA–PR–03–12


Beech bark disease causes significant mortality and defect in American beech, Fagus grandifolia (Ehrh.). The disease results when bark, attacked and altered by the beech scale, Cryptococcus fagisuga Lind., is invaded and killed by fungi, primarily Nectria coccinea var. faginata Lohman, Watson, and Ayers, and sometimes Nectria galligena Bres.

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