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Bark Beetles of the Genus Hylastes Erichson in North America
Maulsby Willett Blackman
出版
U.S. Department of Agriculture
, 1941
URL
http://books.google.com.hk/books?id=abAoAAAAYAAJ&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
The genus Hylastes Erichson occurs throughout the continent of North America from Alaska and Central America and from the Atlantic coast to the Pacific coast. This publication is concerned with the forms found north of Mexico. Coniferous forests in every region of the United States contain one or several species of Hylastes. Most of the species of the genus favor the pines as hosts, but some spruces are also attacked, as well as Douglas fir and to a less extent the true firs.