|pine sawflies (Neodiprion autumnalis) by USDA Forest Service - Region 2 - Rocky Mountain Region Archive, USDA Forest Service, Bugwood.org|
This is Colorado's first attempt at predicting the defoliation by pine sawfly by egg counting, and if it is successful, it could be used to generate a model for future outbreaks. As chemical controls should be applied at egg hatching, the plan can help inform applicators of where the heaviest infestations are likely to occur.
Denver Post: Sawfly wasp outbreak spreading through Colorado's ponderosa pines
Colorado State Forest Service: Pines Southeast of Denver Expected to Suffer Damage from Sawfly this Summer
Franktown District, CSFS: Potential for Pine Sawfly (Neodiprion Autumnalis) Defoliation of Ponderosa Pine Forests in Elbert County, CO, in 2015