| dc.date |
2006-10-30T18:45:31Z |
|
| dc.date |
2006-10-30T18:45:31Z |
|
| dc.date |
1972 |
|
| dc.date.accessioned |
2013-10-16T07:41:13Z |
|
| dc.date.available |
2013-10-16T07:41:13Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3256 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3256 |
|
| dc.description |
Over 10,000 acres of aerially visible western hemlock looper defoliation
on grand fir was detected on State and Federal forests of central
Idaho in 1972. This is the first report of this insect building up
in Region 1 since a widespread outbreak in 1937-39.
The western hemlock looper has the potential of being one of the
most destructive forest insects in North America. It can cause tree
mortality in 1 or 2 years of feeding. Extensive tree mortality has
been associated with nearly all past outbreaks.
Outbreaks usually persist for about 3 years at epidemic levels prior
to collapsing from natural control agents. Insecticides have been
effective in protecting large stands during some looper infestations. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, Mont. : U.S. Dept. of Agriculture, Forest Service, Division of State and Private Forestry, Northern Region |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 72-10 |
|
| dc.title |
Status of the western hemlock looper in the northern region, 1972 |
|
| dc.type |
Technical Report |
|