Tree baits should only be used with an integrated pest management strategy. They contain semiochemicals to attract beetles directly to a tree. As a result, they are designed to initiate an early attack. Tree baits differ from funnel trap lures because they do not contain any kairomones from the host tree. They are stapled to the tree and usually placed 50 meters apart from each other.
The field life of a tree bait is about 60-90 days but the biology of an attack is more important in determining efficacy of the bait. Tree baits are used as an initial beetle attractant to a tree. Once tree baits have caused a successful attack to the target tree, nature takes over. The beetles begin exuding aggregation pheromones while the injured tree releases attracting kairomones that further entice more beetles to land on it. At that point, the tree baits have served their purpose and are no longer needed. The attacked trees are subsequently removed from the area by harvesting before the next season.
For further detailed instructions, please read our technical bulletin here.