Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976

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DC Field	Value	Language
dc.date	2006-11-13T15:19:42Z	-
dc.date	2006-11-13T15:19:42Z	-
dc.date	1976	-
dc.date.accessioned	2013-10-16T07:41:53Z	-
dc.date.available	2013-10-16T07:41:53Z	-
dc.date.issued	2013-10-16	-
dc.identifier	http://hdl.handle.net/1957/3366	-
dc.identifier.uri	http://koha.mediu.edu.my:8181/xmlui/handle/1957/3366	-
dc.description	Aerial surveys of six Montana National Forests in 1975 found a 22.1% increase in the area of visible defoliation caused by the western spruce budworm. It is estimated that 2,278,804 acres of Douglas-fir forests are now suffering at least 25% defoliation. This is an increase of 503,706 acres over the 1,775,098 acres defoliated in 1974. Egg mass surveys were made in infested areas to predict the degree of defoliation in 1976. Based on this survey, the following mean percent defoliation is predicted for each National Forest: Deerlodge, 56%; Helena, 57%; Gallatin, 29%; Beaverhead, 37%; Flathead, 5%; Lolo, 24%.	-
dc.language	en_US	-
dc.publisher	Missoula, MT. : Forest Environmental Protection, USDA, Forest Service, Northern Region, State & Private Forestry	-
dc.relation	Report (United States. Forest Service. Northern Region)	-
dc.relation	no. 76-4	-
dc.relation	Forest environmental protection	-
dc.title	Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976	-
dc.type	Technical Report	-
Appears in Collections:	ScholarsArchive@OSU

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