Scientists at UC Riverside have boosted termite kill rates from 70% to over 95% by luring western drywood termites with pinene, a natural pine scent that mimics food.
How pinene improves localized insecticide treatments
Pinene, a compound released by forest trees, attracts termites to treated wood where localized insecticide injection occurs, increasing effectiveness without widespread fumigation. This method targets termite galleries directly, using fewer chemicals and potentially offering longer protection against reinfestation. Researchers found that without pinene, localized treatments achieved about 70% mortality; adding pinene pushed results beyond 95%. The approach leverages termites’ natural foraging behavior, turning their instinct to seek food into a vulnerability.
Why western drywood termites pose a persistent threat
Western drywood termites are native to North America and play a key ecological role in breaking down dead wood, but they become destructive when they invade structural lumber in homes. They do not distinguish between natural wood and building materials, making infestations likely in warmer regions like California, Florida, and parts of Canada, and Mexico. As entomologist Dong-Hwan Choe noted, “It’s only a matter of time before termites attack a house, especially in warmer parts of the states.” Their hidden feeding habits inside wood make detection and eradication difficult.
Limitations of current fumigation practices
Fumigation, which involves sealing a home and filling it with sulfuryl fluoride gas, remains common in California but carries significant drawbacks. The chemical is toxic to humans, acts as a greenhouse gas, is costly, and does not prevent future infestations—leading some homeowners to repeat treatment every three to five years. Choe emphasized that even thorough fumigation fails to offer lasting protection, as reinfestation can occur shortly after treatment ends. These shortcomings have driven demand for alternatives that are safer, cheaper, and more sustainable.
What is pinene and why does it attract termites?
Pinene is a natural compound released by forest trees that smells like food to western drywood termites, prompting them to move toward treated wood sources.
How does this method compare to fumigation in terms of cost and safety?
The pinene-assisted localized treatment uses fewer chemicals, avoids toxic greenhouse gases like sulfuryl fluoride, and is less expensive than whole-structure fumigation, though exact cost figures were not provided in the source.