Skip to Main Content
Verbenone-releasing flakes protect individual Pinus contorta trees from attack by Dendroctonus ponderosae and Dendroctonus valens (Coleoptera: Curculionidae, Scolytinae)Author(s): Nancy E. Gillette; John D. Stein; Donald R. Owen; Jeffrey N. Webster; Gary O. Fiddler; Sylvia R. Mori; David L. Wood
Source: Agricultural and forest entomology 8(3): 243-251
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (224.68 KB)
- In a study site in interior northern California, twenty individual lodgepole pines Pinus contorta were sprayed with a suspension of DISRUPT Micro-Flake ® Verbenone (4,6,6-trimethylbicyclo(3.1)hept-3-en-2-one) Bark Beetle Anti-Aggregant flakes (Hercon Environmental, Emigsville, Pennsylvania) in water, with sticker and thickener, from ground level to a height of 7 m. Twenty trees sprayed with just water, sticker and thickener served as controls. All trees were baited immediately after spraying with mountain pine beetle Dendroctonus ponderosae aggregation pheromone lures, and lures were refreshed after 4 weeks.
- Trees treated with verbenone had significantly lower attack density by D. ponderosae than controls at 2, 4, 6 and 8 weeks after application of flakes.
- None of the treated trees was attacked by red turpentine beetle Dendroctonus valens, whereas control trees averaged nearly two D. valens attacks per tree, 8 weeks after treatment.
- A dry frass index, used to predict ultimate tree mortality, was significantly higher in control trees than treated trees for all four sampling intervals. This index proved to be a significant predictor of ultimate tree mortality.
- Ten months after application, treated trees showed significantly lower mortality than control trees.
- Individual tree protection, lodgepole pine, mountain pine beetle, pheromones, Pinaceae, red turpentine beetle, Scolytinae, Scolytidae, semiochemicals, 4,6,6-trimethylbicyclo(3.1)hept-3-en-2-one
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGillette, Nancy E.; Stein, John D.; Owen, Donald R.; Webster, Jeffrey N.; Fiddler, Gary O.; Mori, Sylvia R.; Wood, David L. 2006. Verbenone-releasing flakes protect individual Pinus contorta trees from attack by Dendroctonus ponderosae and Dendroctonus valens (Coleoptera: Curculionidae, Scolytinae). Agricultural and forest entomology 8(3): 243-251
KeywordsIndividual tree protection, lodgepole pine, mountain pine beetle, pheromones, Pinaceae, red turpentine beetle, Scolytinae, Scolytidae, semiochemicals, 4, 6, 6-trimethylbicyclo(3.1)hept-3-en-2-one
- Mountain pine beetle infestations in relation to lodgepole pine diameters
- Probability of infestation and extent of mortality models for mountain pine beetle in lodgepole pine forests in Colorado
- Population densities and tree diameter effects associated with verbenone treatments to reduce mountain pine beetle-caused mortality of lodgepole pine
XML: View XML