Insects and diseases can pose serious threats to a forest’s health. Our district foresters are available for site visits to look at specific insect or disease concerns on your property.
If your questions cannot be resolved with the information provided, please contact the district office. For a fee, foresters are available for site visits to look at specific insect or disease concerns on your property. Samples of the problem also can be sent to our state entomologist in Fort Collins for further investigation.
Bark beetle that attacks all species of spruce
Attracted to large diameter trees that have been felled by
wind or stressed by natural
factors such as flooding, drought or old age
Control: Maintain healthy stands and remove infected trees immediately
Since 2004, rapid decline in aspen stands has been noticed in southwest Colorado – especially at lower elevations. Additionally, regeneration is sparse in stands with heavy mortality. Researchers have been unable to assign a specific causal agent; however, it appears to be a combination of drought, cankers, borers and defoliators. Ongoing research may provide some answers in the near future.
This annual survey is led, coordinated and funded by the U.S. Forest Service Health Protection personnel. A small fixed-wing aircraft is flown about 1,000 to 1,500 feet above the treetops while the surveyor marks the location, number and identity of diseased trees on a map. The CSFS has assisted in the aerial survey since the 1970s and even more significantly beginning in 1997.