22 July 2014
Invasive Species (EC)
In the United States, there are numerous animals that are attacking the forests. Some of these species are classified as “invasive species,” this means the animal is not natural to the habitat, while some invasive species are not a problem, most are. A few species that are attacking the forests are the, Asian Long-Haired Beetle, Emerald Ash Borer, and Mountain Pine Beetle.
The Asian Long-Haired Beetle (ALB) is currently found in New York, New Jersey, Illinois, Massachusetts, California, and Ohio. ALB is native to eastern China, Japan and Korea. The species was accidentally introduced into the United States, being first discovered ...view middle of the document...
Since the majority of the beetle’s life is spent deep inside the tree, it is difficult to control using insecticides.
The only assured method of dealing with the beetles it to cut the trees down. If these beetles become more common, then they could eventually destroy all of our forests, and therefore cause the loss of billions of dollars. Throughout the summer, ALB can be seen on tree trunks and branches, walls, outdoor furniture, cars, and sidewalks. According to Farm Progress, some signs of the beetle are “Dime-sized (1/4" or larger), perfectly round exit holes, shallow scars in bark where the eggs are laid, sawdust-like materials, called frass, on the ground and the branches or even dead branches.”
The Emerald Ash Borer (EAB) is a beetle species native to eastern Russia, northern China, Japan and Korea. In 2002 the EAB was discovered in Michigan, since then it has been found in many more states such as, Colorado, Connecticut, Georgia, Illinois, Indiana, Iowa, Kansas, Maryland, Massachusetts, Minnesota, Missouri, New Hampshire, New Jersey, new york, north Carolina, Ohio, Pennsylvania, Tennessee, Virginia, west Virginia, and Wisconsin. In North America, the only tree in which EAB has been found is the ash tree. Trees in woodlots and landscaped areas are at risk. According to a website dedicated to information about EAB, all species of North American ash are at risk.
The life cycle of the EAB only spans one- or two-years. Adults begin to emerge mid to late May, but peak in late June. Two weeks after emergence, females begin to lay eggs, which hatch in one or two weeks. Tiny Larvae bore through the bark and into cambium, which is the area between the bark and wood where nutrient levels are high. The larvae generally stay in this area from late July to early August through October, feeding under the bark. Larvae typically pass through four growing stages and range from 1 to 1.25 inches long. During the winter months, most larvae stay in a small spot of outer bark or the outer inch of wood. Pupation occurs in spring, and a new generation of adults emerge in May or early June to repeat the cycle again. EAB kill trees usually starting at the top of trees. Due to the larvae eating the nutrients, one-third to one-half of the branches may die in one year. Sometimes ash trees push out sprouts from the trunk after the upper portions of the tree dies. The beetle will also leave a D-shaped exit hole in the bark when they emerge in June.
Many agencies and universities are working together to educate citizens about identification of ash trees. State and federal agencies have...