Here are some studies that detail the effectiveness of Verbenone in controlled studies conducted by and for several Towns.
Attack around trees treated with Verbenone was substantially lower than around both pheromone-baited and untreated control trees, amounting to just 13.5% overall... Our results confirm that verbenone is an effective deterrent to attack by the Mountain Pine Beetle. However, they also confirm that the effect of verbenone is not absolute.
We conclude that the Verbenone pouch manufactured by Pherotech International is effective at reducing the risk of mass-attack by the Mountain Pine Beetle when used as directed on the label and applied at the appropriate time.
Some often-quoted, less successful studies done in 2000-2001 used much smaller Verbenone pouches.
"The original pouch had 4.6 grams of active ingredient in a plastic like matrix. The new and improved pouches have 7 grams absorbed in a sponge. The sponge provides for a more uniform release rate and the larger quantity provides for a longer lasting effect."
Alan Vaudry
New Product Development Manager
Phero Tech International Inc.
Kill Pine Beetles
