أعرض تسجيلة المادة بشكل مبسط
| dc.date |
2006-11-22T16:38:41Z |
|
| dc.date |
2006-11-22T16:38:41Z |
|
| dc.date |
1979 |
|
| dc.date.accessioned |
2013-10-16T07:42:23Z |
|
| dc.date.available |
2013-10-16T07:42:23Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3500 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3500 |
|
| dc.description |
The larch casebearer, Coleophora laricella (Hubner) was first reported
attacking western larch, Larix occidentalis, in Idaho in 1957
(Denton, 1958), 71 years after its introduction into Massachusetts
from Europe. The apparent successful regulation of this insect in
the eastern U.S. by introduced parasites prompted biological control
attempts in the West. Introduction of Agathis pumila (Ratzeburg),
considered one of the most significant parasites in the East, was
emphasized following a period of laboratory and field evaluations.
Between 1966 and 1969, Forest Insect & Disease Management released
A. pumila at 378 locations in Washington, Idaho, and Montana. Most
releases consisted of attaching parasitized casebearer-infested
branches to lower branches of three infested trees at each release
location. Evaluations made between 1967 and 1972 verified the
presence of A. pumila on 127 plots out of 270 examined and percent
parasitism ranged from 0.1 to 90 percent. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, MT. : Forest Insect & Disease Management, USDA, Forest Service, Northern Region, State & Private Forestry |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 79-3 |
|
| dc.relation |
Forest insect & disease management |
|
| dc.title |
Reevaluation of larch casebearer parasites in casebearer-infested stands of Region I |
|
| dc.type |
Technical Report |
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الملفات في هذه المادة
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لا توجد أي ملفات مرتبطة بهذه المادة.
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هذه المادة تبدو في المجموعات التالية:
أعرض تسجيلة المادة بشكل مبسط