Aerial application of verbenone reduces attack of lodgepole pine by mountain pine beetle

Autor:	Patrick J. Shea, Gary E. Daterman, Mark D. McGregor
Rok vydání:	1992
Předmět:	Pinus contorta Integrated pest management Global and Planetary Change Ecology biology Forestry biology.organism_classification Aerial application chemistry.chemical_compound chemistry Agronomy visual_art visual_art.visual_art_medium Bark PEST analysis Verbenone Hectare Mountain pine beetle
Zdroj:	Canadian Journal of Forest Research. 22:436-441
ISSN:	1208-6037 0045-5067
Popis:	Mountain pine beetle, Dendroctonusponderosae Hopkins, is the primary pest affecting lodgepole pine, Pinuscontorta var. latifolia Engelm., ecosystems in western North America. In 1988, aerial treatments of the antiaggregation pheromone, verbenone, were applied to lodgepole pine stands infested with mountain pine beetle in northwestern Montana. The pheromone was formulated by PHERO TECH Inc. in controlled-release, cylindrical 5 × 5 mm plastic beads and applied without benefit of a sticker at the rate of 54 g verbenone per hectare. There were significantly fewer successfully attacked trees on the treated plots, as evidenced by (i) a fourfold greater incidence of current-year attacked trees per hectare in the untreated check plots and (ii) the significantly lower (α = 0.05) ratio of 1988:1987 attacked trees in the treated plots. Further, the number of trees per hectare resisting attacks (as reflected by number of trees pitching out bark beetles) was higher (α = 0.05) in the treated plots. More pitch outs occurred in treated plots presumably because avoidance of verbenone by beetles reduced the number of beetles below that needed to overcome the natural resistance of attacked trees.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17d6b103d2a0a04d30beecaa0411579d https://doi.org/10.1139/x92-057 Zobrazit plný text záznamu