Progress 01/01/03 to 09/30/05
Outputs
OUTPUTS: This project is focusing on what effects fire has on the susceptibility and suitablility of fire-affected Douglas-fir to Douglas-fir beetle. We have completed two years of sampling of fire-affected and fire-unaffected stands at the sites of five fires in Montana and Washington. Sampling has included tree tissues for assessing changes in tree defenses and nutrient content, and bark samples for assessing brood production of beetles. Bark beetle and natural enemies populations have been monitored using pheromone traps. Analyses of tree tissues and identification of insects captured in traps for the first two years is near complete. After one more year of sampling we will be able to determine how fire effects changes in trees that in turn affect beetle and natural enemy populations. PARTICIPANTS: Nothing significant to report during this reporting period. TARGET AUDIENCES: Nothing significant to report during this reporting period. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
This project will provide valuable information for managing Douglas-fir beetles after fire.
Publications
- 2004, Dahlsten, D.L., D.L. Six, D.L. Rowney, A.B. Lawson, N. Erbilgin, and K.F. Raffa. 2004. In press. Attraction of Ips pini (Coleoptera: Scolytidae) and its predators to natural attractants and synthetic semiochemicals: Implications for population monitoring in Northern California. Environmental Entomology.
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Progress 01/01/04 to 12/30/04
Outputs
This project is focusing on what effects fire has on the susceptibility and suitablility of fire-affected Douglas-fir to Douglas-fir beetle. We have completed two years of sampling of fire-affected and fire-unaffected stands at the sites of five fires in Montana and Washington. Sampling has included tree tissues for assessing changes in tree defenses and nutrient content, and bark samples for assessing brood production of beetles. Bark beetle and natural enemies populations have been monitored using pheromone traps. Analyses of tree tissues and identification of insects captured in traps for the first two years is near complete. After one more year of sampling we will be able to determine how fire effects changes in trees that in turn affect beetle and natural enemy populations.
Impacts
This project will provide valuable information for managing Douglas-fir beetles after fire.
Publications
- Dahlsten, D.L., D.L. Six, D.L. Rowney, A.B. Lawson, N. Erbilgin, and K.F. Raffa. 2004. In press. Attraction of Ips pini (Coleoptera: Scolytidae) and its predators to natural attractants and synthetic semiochemicals: Implications for population monitoring in Northern California. Environmental Entomology.
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Progress 01/01/03 to 12/31/03
Outputs
This project is looking at how various levels of fire damage contribute to population increases in the Douglas-fir beetle, a major pest of Douglas-fir. We are looking at how levels of fire damage affect beetle choice of trees, tree defenses, quality of burned trees as food resources for beetles and responses by natural enemies. By looking at all the major factors that affect this beetle's ability to increase in number we can then begin to develop a simple model for use in predicting where to best implement management.
Impacts
At present we know very little about how fire affects Douglas-fir beetle populations and consequently it is difficult to know when management is indicated. This study will provide a set of guidelines for managers to use to make more accurate management decisions.
Publications
- No publications reported this period
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