Your trees are under assault by invasive insects. Learn to identify these harmful predators and protect your trees:
Asian Longhorned Beetle
The Asian Longhorned Beetle (Anoplophora glabripennis) known as the Starry Sky or Sky Beetle is native to eastern China, Japan, and Korea. This species has now been accidentally introduced to the United States, where it was first discovered in 1996, as well as Canada and several countries in Europe, including Austria, France, Germany, and Italy. This beetle is believed to have been spread from Asia in solid wood packaging material. Outbreaks of this beetle pose a severe threat to even perfectly healthy trees in both forests and urban and suburban landscapes. More at Wikipedia »
Balsam woolly adelgids (Adelges piceae) are small wingless insects that infest and kill firs, especially Balsam Fir and Fraser Fir. They are an invasive species from Europe introduced to the United States around 1900.
Because this predator is not native, the Fraser fir has not evolved any type of defense against it. These insects typically lay about one hundred eggs and have three generations per year. The adelgid attacks the tree by feeding in fissures within the bark of trees larger than about four centimeters in diameter at breast height. As it feeds, it releases toxins contained within its saliva. These toxins reduce the conductance of sapwood being built, which causes water stress and kills the trees. More at Wikipedia »
Hemlock woolly adelgid (Adelges tsugae), commonly abbreviated as HWA is a true bug native to East Asia that feeds by sucking sap from hemlock trees (Tsuga spp.). In eastern North America it is a destructive pest that poses a major threat to the eastern hemlock (Tsuga canadensis) and the Carolina hemlock (Tsuga caroliniana). The former extends north of the current range of the adelgid, but there are fears that it could spread to these areas. Accidentally introduced to North America from Asia in 1924, HWA was first found in the eastern United States some decades later. In Pennsylvania, for example, the earliest record is from 1967. The pest has now been established in eleven eastern states from Georgia to Massachusetts, causing widespread mortality of hemlock trees. 50% of the geographic range of eastern hemlock has been impacted by HWA. More at Wikipedia »
The gypsy moth, Lymantria dispar, is a moth in the family Lymantriidae of Eurasian origin. Originally ranging from Europe to Asia, it was introduced to North America in the late 1860s and has been expanding its range ever since. It is also known as the Asian gypsy moth.
Gypsy moth egg masses are typically laid on branches and trunks of trees, but egg masses may be found in any sheltered location, particularly human dwellings, sometimes to the point of even nesting in clothes and footwear. Female gypsy moths in the U.S. are flightless, so they lay eggs on the surface where they emerged from their pupa or somewhere they can crawl – thus nearby. More at Wikipedia »