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Spruce Budworm

Gary Adair Simmons

出版	Cooperative Extension Service, Michigan State University, 1978
URL	http://books.google.com.hk/books?id=nn0azQEACAAJ&hl=&source=gbs_api

註釋

This bulletin discusses the biology and life history of the Spruce budworm. Includes information on insect damage and impact, chemical control, and silvicultural control.