25 Jul '11, 9am

Latest: The Hemlock Woolly Adelgid has Invaded the American North-East

Latest: The Hemlock Woolly Adelgid has Invaded the American North-East

Photo: hspauldi The Hemlock Woolly Adelgid , or Adelges tsugae (Annand), invaded the United States by stealthily stowing away in cargo from its native Asian haunts. It now wreaks havoc on hemlock groves in the north-eastern United States. An Introduction to the Hemlock Woolly Adelgid Photo: grifray This bold aphid-like insect found its way to the western United States in the 1920s, but was not considered a pest. After it arrived on the East Coast in 1951, it began to attack and destroy Eastern Hemlock trees, Tsuga canadensis . Each Hemlock Woolly Adelgid is a female; most are fully capable of laying eggs twice a year. Its range of destruction includes southern Vermont, southern New Hampshire, western Pennsylvania and southern Maine. This covers perhaps one-third of the range of the Eastern Hemlock forests. The Life Cycle of the Hemlock Woolly Adelgid Photo: hspauldi In the...

Full article: http://www.environmentalgraffiti.com/animals/news-hemlock...

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