The
devastation caused by the Mountain Pine Beetle continues to spread in Custer County.
The
Mountain Pine Beetle swarms in late summer (mid-July to early
September), leaving the infected (dead) pine trees and seeking other pine
trees. Typically the beetles from one tree will infect four or five
new trees. The beetles also carry a blue fungus, and the combination of
fungus and beetles will kill the newly infected tree over the next several
months. The next year the tree will suddenly turn completely brown.
The
Colorado State University has extensive details about this epidemic.
Those of you who have traveled west of Salida on Hwy 50 toward Monarch
Pass have likely seen the vast number of pine trees that have died the
last year due to the mountain pine beetle.
Once
a tree is infected, there is usually nothing that can be done to save that
tree. However certain insecticides can be applied during the May to
mid-July period to cause the beetles to avoid the sprayed trees.
Basically this involves spraying the trunks of the individual trees, up to
a height of 15 or so feet. The spray doesn't kill the
beetles (the spray is applied prior to the beetles swarming) but makes the
tree less attractive to the swarm, hopefully causing the beetles to go
elsewhere.