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Aerially applied verbenone-releasing flakes protect Pinus contorta stands from attack by Dendroctonus ponderosae in California and IdahoAuthor(s): N. E. Gillette; N. Erbilgin; J. N. Webster; L. Pederson; S. R. Mori; J. D. Stein; D. R. Owen; K. M. Bischel; D. L. Wood
Source: Forest Ecology and Management 257(5): 1405-1412
Publication Series: Scientific Journal (JRNL)
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DescriptionWe tested a new formulation of verbenone, an antiaggregation pheromone of the mountain pine beetle (Dendroctonus ponderosae Hopkins) (Coleoptera: Curculionidae: Scolytinae), for area-wide protection of lodgepole pine (Pinus contorta Douglas ex Loudon) stands in the western United States. Helicopter applications of verbenone-releasing laminated flakes were made at the rate of 370 g of active ingredient/ha to two sites, one in California and one in Idaho, during summer 2005. Each site consisted of five 20.23-ha treated plots and five matching 20.23-ha untreated plots. We assessed D. ponderosae flight into study plots using traps baited with aggregation pheromones and we tallied D. ponderosae attack rates on P. contorta trees in treated and control plots before and after application. There were no significant differences between numbers of D. ponderosae trapped on treated and control plots. However, a significantly smaller proportion of P. contorta trees was attacked in treated plots than in control plots at both sites; the attack rate in untreated stands was roughly three times that of treated stands in both California and Idaho, even at this low application rate. Furthermore, attack rate in 2004 was a significant explanatory variable for the response in 2005 regardless of treatment in both California and Idaho. There was no significant treatment effect at either site on attraction of Temnochila chlorodia (Coleoptera: Trogositidae) Mannerheim, a key predator of D. ponderosae, to the prey aggregation pheromone.
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CitationGillette, N. E.; Erbilgin, N.; Webster, J. N.; Pederson, L.; Mori, S. R.; Stein, J. D.; Owen, D. R.; Bischel, K. M.; Wood, D. L. 2009. Aerially applied verbenone-releasing flakes protect Pinus contorta stands from attack by Dendroctonus ponderosae in California and Idaho Forest Ecology and Management 257(5): 1405-1412
KeywordsMountain pine beetle, Lodgepole pines, Forest pest management, Pheromones, Semiochemicals, Antiaggregation, Scolytidae, Bark beetles, Temnochila chlorodia
- Five-year operational trial of verbenone to deter mountain pine beetle (Dendroctonus ponderosae); Coleoptera: Scolytidae) attack of lodgepole pine (Pinus contorta).
- Verbenone-releasing flakes protect individual Pinus contorta trees from attack by Dendroctonus ponderosae and Dendroctonus valens (Coleoptera: Curculionidae, Scolytinae)
- Using pheromones to protect heat-injured lodgepole pine from mountain pine beetle infestation
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