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    Author(s): E. Matthew HansenJim C. Vandygriff; Robert J. Cain; David Wakarchuk
    Date: 2006
    Source: Journal of Economic Entomology. 99(2): 373-382.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (1.22 MB)

    Description

    We compared naturally baited trapping systems to synthetically baited funnel traps and fallen trap trees for suppressing preoutbreak spruce beetle, Dendroctonus rufipennis Kirby, populations. Lures for the traps were fresh spruce (Picea spp.) bolts or bark sections, augmented by adding female spruce beetles to create secondary attraction. In 2003, we compared a naturally baited system (“bolt trap”) with fallen trap trees and with synthetically baited funnel traps. Trap performance was evaluated by comparing total beetle captures and spillover of attacks into nearby host trees. Overall, the trap systems did not significantly differ in spruce beetle captures, although bolt traps caught 6 to 7 times more beetles than funnel traps during the first 4 wk of testing. Funnel traps with synthetic lures had significantly more spillover than either trap trees or bolt traps. The study was repeated in 2004 with modifications including an enhanced blend synthetic lure. Again, trap captures were generally similar among naturally and synthetically baited traps, but naturally baited traps had significantly less spillover. Although relatively labor-intensive, the bolt trap could be used to suppress preoutbreak beetle populations, especially when spillover is undesirable. Our work provides additional avenues for management of spruce beetles and suggests that currently used synthetic lures can be improved.

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    Citation

    Hansen, E. Matthew; Vandygriff, Jim C.; Cain, Robert J.; Wakarchuk, David. 2006. Comparison of naturally and synthetically baited spruce beetle trapping systems in the central Rocky Mountains. Journal of Economic Entomology. 99(2): 373-382.

    Keywords

    pheromones, bark beetle management, funnel traps, semiochemicals

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