Major Forest Insect and Disease Conditions in the United States

United States. Forest Service‏

آذر ۲۰۱۵ · Government Printing Office

درباره این ای-کتاب

The report focuses on the 20 major insects and diseases that annually cause defoliation and mortality in forests of the United States. This 2013 edition contains updated charts, tables, and maps, plus, it provides a national summary of the major changes and status of these 20 forest pests.
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