Initial releases of Chrysocharis laricinellae and Dicladocerus westwoodii for biological control of the larch casebearer in the Western United States

by Roger B. Ryan

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Published 1973 by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in Portland, Or .
Written in English

Subjects:

• Larch casebearer -- Biological control -- West (U.S.),
• Larches -- Diseases and pests -- West (U.S.)

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Edition Notes

Statement	by R.B. Ryan and R.E. Denton.
Series	USDA Forest Service research note PNW -- 200.
Contributions	Denton, Robert E., Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
The Physical Object
Pagination	4 p. ;
ID Numbers
Open Library	OL17725116M

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