Zobrazeno 1 - 4
of 4
pro vyhledávání: '"David L. Overhulser"'
Autor:
David L. Overhulser, David L. Azuma
Publikováno v:
Western Journal of Applied Forestry. 23:19-25
Forest Inventory and Analysis data from three inventory periods were used to examine the effects of a western spruce budworm outbreak on private lands in eastern Oregon. Growth was negatively related to defoliation with differences between crown rati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6712149a112eeef242ab593c8b2f7770
https://doi.org/10.1093/wjaf/23.1.19
https://doi.org/10.1093/wjaf/23.1.19
Publikováno v:
Western Journal of Applied Forestry. 21:159-164
The spruce weevil, Pissodes strobi (Peck), is a serious pest of Sitka spruce, Picea sitchensis (Bong.) Carr, in Oregon. Weevils cause damage by killing the leader of a tree, resulting in defects such as crooks and forks that can reduce tree merchanta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d973d8502e9d49cd7c9028edc20914ec
https://doi.org/10.1093/wjaf/21.3.159
https://doi.org/10.1093/wjaf/21.3.159
Publikováno v:
Journal of Economic Entomology. 86:470-474
Aerial applications of esfenvalerate significantly reduced populations of a Douglas-fir cone gall midge, Contarinia oregonensis Foote, and a Douglas-fir seed chalcid, Megastigmus spermotrophus Wachtl, in mature Douglas-fir, Pseudotsuga menziesii (Mir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ad6161f79b4e12d76c414c750d36514
https://doi.org/10.1093/jee/86.2.470
https://doi.org/10.1093/jee/86.2.470
Autor:
David L. Overhulser, Christine G. Niwa
Publikováno v:
Journal of Economic Entomology. 85:2323-2328
An exclusion study was done in Oregon to determine the incidence of Megastigmus spermotrophus Wachtl in unfertilized Douglas-fir, Pseudotsuga menziesii (Mirbel) Franco, seed. Larvae were detected in seeds of cones, from which pollen was excluded, fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::482215c207b5dda6194777dcb57fa512
https://doi.org/10.1093/jee/85.6.2323
https://doi.org/10.1093/jee/85.6.2323