أعرض تسجيلة المادة بشكل مبسط
| dc.date |
2006-11-07T23:53:17Z |
|
| dc.date |
2006-11-07T23:53:17Z |
|
| dc.date |
1975 |
|
| dc.date.accessioned |
2013-10-16T07:41:39Z |
|
| dc.date.available |
2013-10-16T07:41:39Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3326 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3326 |
|
| dc.description |
Aerially visible defoliation by the western spruce budworm,
Choristoneura occidentalis Freeman, increased from 149,250
acres in 1973 to 649,319 acres in 1974 on five eastern Montana
National Forests. An egg mass survey during the fall of 1974
predicted that additional defoliation will occur in 1975 on
47 of 48 plots located on these Forests. Areas with the highest
potential for increasing populations in 1975 are being considered
as sites for pilot control projects of several promising chemical
and biological insecticides. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, MT. : Division of State & Private Forestry, USDA Forest Service/Northern Region |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 75-3 |
|
| dc.relation |
Forest environmental protection |
|
| dc.title |
Potential for defoliation by western spruce budworm in Douglas-fir stands in eastern Montana, 1975 |
|
| dc.type |
Technical Report |
|
الملفات في هذه المادة
|
لا توجد أي ملفات مرتبطة بهذه المادة.
|
هذه المادة تبدو في المجموعات التالية:
أعرض تسجيلة المادة بشكل مبسط