Climb! Tree Services owner Jonathan Barfield examines ponderosa pines on Log Hill Mesa for signs of beetle infestation. Barfield, who is a certified arborist, recommends protecting pine trees from beetles using pheromones, specifically by applying a paste with an active anti-aggression pheromone that tells mountain pine beetles and other species of bark beetles that a tree is already taken, the beetle party’s over and they need to move on. “It’s like a chemical conversation,” Barfield said. Photo by Erin McIntyre | Ouray County Plaindealer