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Topic in Depth - Tree Troubles

This Topic in Depth explores some of the diseases and other threats, such as gypsy moths, emerald ash borers, and Asian longhorned beetles that certain trees must contend with to remain healthy and vital.
USDA Forest Service-St. Paul Field...
This site from the USDA Forest Service contains links to a variety of How to Publications and Fact Sheets on forestry related topics. Many of the publications...
Forest & Shade Tree Pathology
Forest & Shade Tree Pathology is a site created by Jim Worrall, a former professor at the College of Environmental Science and Forestry. The major focus of...
Oak Wilt: A Threat to Red Oaks &...
Oak Wilt: A Threat to Red Oaks & White Oaks Species was created by Dr. David L. Roberts at Michigan State University Extension. Dr. Robert?s concise site c...
USDA Forest Service: Emerald Ash... PDF
The Emerald Ash Borer(EAB) has become a pesky problem in North America in recent years, after being introduced into the ecosystem in the early 1990s. This...
USDA Forest Service: Gypsy Moth... PDF
The USDA Forest Service compiled information from its gypsy moth suppression, eradication, and slow-the-spread projects to provide you with a comprehensive...
USDA Forest Service: Asian... PDF
Asian longhorned beetles are an exotic species of insect that have been wreaking havoc on North American trees, particularly maples, alders, birches, elms,...



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Large thunderstorm from 30,000 feet.
Drawing tools for mathematics.
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There are 206 bones in the adult human body, and in children there are 300 because as they grow some of the bones fuse together.


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