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Biscuit beetle pheromone trap12/18/2023 ![]() ![]() ![]() The use of pheromone-baited traps to monitor and manage Douglas-fir beetles has been refined by recent research. Millions of dollars worth of mature and old-growth Douglas-fir trees have been protected from the Douglas-fir beetle during the first five years that MCH has been available for operational treatments. Not only is this an important tool for resource managers, but, since it is the first and only treatment of its kind anywhere in the world, it also serves as a model for development of similar treatments for other economically important bark beetle species. Use of the antiaggregation pheromone, MCH, to protect high-valued trees and stands during outbreaks is now a standard practice in this region. Impacts Pheromone-based strategies are becoming an increasingly important part of resource management plans to prevent undesirable losses caused by the Douglas-fir beetle throughout western North America. Together these hazardĪnd risk rating systems can be used by resource managers to predict where future infestations are likely to occur and, furthermore, to develop management plans to minimize negative impacts on resource values. The results of that study were used to develop a risk rating system for Douglas-fir beetle that predicts the probability of subsequent infestations at various distances from current infestations. Another study used historical infestation data to explore spatial relationships among Douglas-fir beetle infestations during outbreaks. One study validated an existing hazard rating system for the Douglas-fir beetle that can now be used with more confidence to rank the relative susceptibility of stands. Although these studies did not involve pheromones, they are necessary to provide the information that managers need to successfully implement the pheromone-based management strategies. Several studies were completed that investigated various aspects of the spatial and temporal dynamics of Douglas-fir beetle infestations. ![]() This information will be valuable to resource managers in determining trap placement for operational trapping programs. Another study determined that the range of attraction of traps baited with the standard Douglas-fir beetle trap lure is at least 200 m and some beetles areĬaught from as far away as 600 m. Traps will need to be designed or used in a way in operational treatments to minimize the undesirable collection of this predator. ![]() One study found that seudenol, an important component of the Douglas-fir beetle trap lure, is highly attractive to Thanasimus undatulus, a predator of the Douglas-fir beetle. Several studies were completed to better understand the response of the Douglas-fir beetle to traps baited with aggregation pheromones. The publication is currently being revised for a second printing. Over 6,000 copies of this publication have been distributed throughout western North America to date. This publication summarizes in non-technical language over 10 years of research and development for natural resource managers. Was printed to describe how to use MCH to protect high-value trees and stands from the Douglas-fir beetle. A proposal is currently pending for funding to conduct an operational test of these new releasers and is supported by a company that currently has a registered formulation of MCH. A treatment using these types of releasers could substantially reduce the application costs and, potentially, increase the number of areas or acreage that could be treated with MCH. The results showed that MCH releasers eluting the pheromone at 3 times the rate and spaced at 3 times the distance of the standard established treatment were equally effective at preventing Douglas-fir beetle infestation. A study was completed to refine the area-wide treatment using MCH, an antiaggregation pheromone, to protect high-value trees at risk of infestation by Douglas-fir beetle. Studies completed during this project have made significant advances toward that goal. Progress 09/01/00 to 09/01/06 Outputs The objective of this project was to develop pheromone-based management strategies for Douglas-fir beetle. ![]()
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