A recent study conducted by experts from the University of Ottawa has revealed that the application of woodchips on woodland trails can substantially decrease the presence of ticks in the area.
The research indicates that using this relatively simple method can lower the risk of tick bites and the potential transmission of Lyme disease for individuals walking in forested areas.
The study focused on two locations within Ottawa’s Greenbelt: the Mer Bleue sector in the east and the Stony Swamp sector in the west.
Across 20 segments of trails, each measuring 50 meters long, researchers used untreated woodchips or woodchips treated with the pesticide deltamethrin.
Results showed a 50% reduction in tick numbers where untreated woodchips were used, while the application of woodchips treated with deltamethrin led to a 99% decrease in tick populations, as reported by Katarina Ost, a member of the research team.
Ost shared insights on the findings during an interview on CBC Radio’s Ottawa Morning.
Effectiveness of Woodchips
Woodchips serve as a deterrent to ticks since these tiny arachnids typically climb vegetation, such as grass, to attach themselves to hikers or pets, Ost explained. By placing woodchips on trails, the growth of the necessary vegetation for ticks to climb is prevented.
Ost further emphasized the suitability of this method for wide, heavily used trails with high tick density, suggesting the potential for broader implementation.
Regarding the use of deltamethrin-treated woodchips, Ost noted its enhanced impact, highlighting its safety for pets as the pesticide remains largely stationary once applied.
For tick prevention in residential settings, the federal government recommends creating a border of wood chips, mulch, or gravel around lawns to create an inhospitable environment for ticks.
Dr. Christopher Labos, a cardiologist and epidemiologist at McGill University, emphasized the importance of controlling tick populations to limit the spread of tick-borne diseases, drawing parallels to the successful control of malaria through insect population management.
Labos underscored the necessity of adhering to trail paths for the woodchip method to be