| dc.date |
2006-12-05T18:51:39Z |
|
| dc.date |
2006-12-05T18:51:39Z |
|
| dc.date |
1985 |
|
| dc.date.accessioned |
2013-10-16T07:42:47Z |
|
| dc.date.available |
2013-10-16T07:42:47Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/3613 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/3613 |
|
| dc.description |
The cranberry girdler, Chrysoteuchia toparia Zeller, has caused increasing damage to tree seedlings in the Coeur d'Alene Nursery since 1980. Heaviest
feeding has occurred on the tap roots of 2+0 Douglas-fir stock. By 1983, 8.2
percent of the seedlings examined in seedbeds were injured by this moth. A
spray program was adopted in 1984 to reduce the amount of damage. Three
applications of Diazinon at 1 lb. active ingredient per acre were used to
kill adult moths, and three applications of Dursban at the same rate were
used to reduce larval populations in the soil of Douglas-fir beds. Results of
the insecticidal treatments were determined in November 1984 during lifting
operations. In sprayed beds, only 0.01 percent of the 2+0 Douglas-fir
seedlings examined were injured, and 0.9 percent of the 3+0 Douglas-firs
examined were injured. There were no beds of unsprayed Douglas-fir seedlings
to use as a check. Because damage was 8.2 percent in beds during 1983, and
moth populations were high in 1984, damage in unsprayed beds could have been 8
percent or greater in 1984. Nurseries consider damage tolerable when it is
below 1.0 percent. |
|
| dc.language |
en_US |
|
| dc.publisher |
Missoula, Mont. : USDA Forest Service, Northern Region |
|
| dc.relation |
Report (United States. Forest Service. Northern Region) |
|
| dc.relation |
no. 85-4 |
|
| dc.relation |
Forest pest management |
|
| dc.title |
Suppression of cranberry girdler damage in beds of Douglas-fir seedlings, Coeur d'Alene Nursery, Idaho Panhandle National Forest, 1984 |
|
| dc.type |
Technical Report |
|