Helicopters will be used to minimize the spread of Douglas fir beetles on Pablo Mountain, starting as early as Friday, Feb. 22, 2019.
The project is an expansion of helicopter logging operations that have been underway in the Williams Lake area this winter. Pablo Mountain is about 10 kilometres south of Williams Lake.
Douglas fir beetle populations are higher than normal in some parts of the Cariboo, but helicopter logging (used to selectively remove infested trees and protect other trees nearby) and related containment treatments have helped slow the spread of the beetles around Williams Lake.
The forest pests normally attack small groups of trees and a significant infestation can weaken and eventually kill a tree over a period of about one year. This is the third straight year that heli-logging has been used in the area to decrease their numbers.
Over the past eight weeks, heli-logging activities have taken place in:
- the Esler area (a few kilometres southwest of Williams Lake)
- the South Lakeside area and a site further south off Anderson Road
- sites in North Lakeside (in steep terrain on Fox Mountain)
- sites on Slater Mountain area (west of Williams Lake)
This project is being conducted under the direction of the Ministry of Forests, Lands, Natural Resource Operations and Rural Development, and is expected to be completed by mid-March. Residents can expect to see helicopters in the air, but no flights will occur over residential buildings. The aircraft will only be flying during daylight hours.
Owners of livestock and pets are advised to take precautions to protect their animals from injuring themselves. Horses can be especially sensitive to helicopter noise and may run if startled.
For safety reasons, members of the public should stay away from areas where helicopters are flying. They are also reminded that unmanned aerial vehicles (drones) must not be operated anywhere near harvesting areas, since doing so can endanger the safety of pilots and workers on the ground.
In addition to the direct harvesting of infested trees, the Williams Lake Beetle Management Unit 2018 Treatment Plan includes the following activities:
- The anti-aggregative pheromone methyl cyclohexenone will be used to prevent or disrupt Douglas fir beetle attacks on small infestation sites. This naturally occurring pheromone can successfully repel the beetles from vulnerable areas and can also help protect small stands of trees near parks, protected areas, campgrounds, residential properties or old growth management areas. In some cases, the application of this pheromone has reduced Douglas fir beetle attacks by over 90%.
- “Trap trees” will be established by cutting down large, healthy Douglas fir trees in accessible areas. The trees will be left on the ground to attract adult beetles in the spring. Trap trees are more successful in attracting adult beetles than standing trees and therefore can greatly reduce the number of attacks on healthy Douglas fir trees nearby. Once adult beetles and larvae are established within a trap tree, it will be taken to a mill where the beetles and larvae will be destroyed in the milling process.
- Where appropriate, and if no other practical options are available, some infested trees may be cut down and burned on site to destroy the beetles present in the bark.
- Funnel traps will also be deployed within mill yards and log storage areas to capture adult beetles.
- The Williams Lake Timber Supply Area contains 3.24 million hectares of forest, with 1.83 million hectares considered to be available for timber harvesting.
- Douglas fir beetle infestations tend to be cyclical. The last major outbreak in the Cariboo-Chilcotin Natural Regional District (prior to the current outbreak) peaked in 2008, covering about 68,550 hectares.
- According to the ministry's latest mapping data (based on aerial surveys conducted in the summer of 2018), Douglas fir beetles affected 48,584 hectares within the Cariboo-Chilcotin Natural Resource District in 2018. About 45,862 hectares were affected in the same region in 2017, with 53,311 hectares affected in 2016.
Read more about Douglas-fir beetle management or read a guide for managing the beetles on private property at: http://www2.gov.bc.ca/gov/content/industry/forestry/managing-our-forest-resources/forest-health/forest-pests/bark-beetles/douglas-fir-beetle/management