A 10 person ACE Southwest crew completed a project in the Coronado National Forest with the goal of protecting the fire-weakened forest from potential bark beetle invasion. Over the course of three months, the crew learned some serious orienteering skills and tree identification.
Crews deployed pheromone caps across 550+ acres. The areas that were treated were identified by the Forest Service as Mt Graham Red Squirrel habitats. ACE crews helped the Forest Service confirm locations of this endangered animal. At last count, there were only 35 remaining in the wild!
Two different types of pheromone caps were used. MCH and Verbenone. They are anti-aggregate pheromones that essentially tell a bark beetle that is searching for a place to lay their eggs that the tree is full and to keep on flying. The bark beetle then flies to the next tree and is told the same thing “sorry the inn is full! No vacancies!” Eventually the bark beetle gets too tired to continue to fly and dies.
The MCH packets protect Douglas firs and Verbenone protects southwestern white pines from bark beetle attack. This was a unique restoration project for our ACE’rs and we are so proud of the contribution made by our team.