From WebRef.org
Jump to: navigation, search

3-Methyl-2-cyclohexene-1-one or Methylcyclohexenone or MCH is used in forests to protect live trees from spruce beetles and Douglas fir beetles. The volatile, naturally occurring chemical acts as a beetle repellent. When small amounts of MCH are attached to dead trees, beetles are prevented from aggregating on the dead trees and from large scale reproduction.