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Putting Up A 'No Vacancy' Sign With Douglas-Fir Beetles


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Today s topic is how to put up a no vacancy sign for the Douglas-fir beetles. Most people are aware of the destruction to large swaths of forest trees brought about by a tiny insect group called bark beetles.
In addition to damaging timber resources, beetle-killed trees negatively impact campgrounds residential sites and increase wildfire severity. Research has found that pheromones, which are chemical cues used in communication within a species, are present in bark beetles and produce two types: aggregation and anti-aggregation. 
Aggregation pheromones are released by female Douglas-fir beetles to serve the purpose  attracting mates and large numbers of beetles to come and help them overwhelm the tree defenses.  ....

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