Key Findings
- Researchers at Rutgers University analyzed rodent samples from New York City, Washington, D.C., New Jersey, and the Philadelphia region.
- Approximately 70% of sampled mouse populations carried genetic mutations associated with resistance to commonly used rodenticides.
- The mutations were more frequent than previously expected, according to postdoctoral fellow JinJia Yu.
- Rats did not show the same mutations, but have been observed learning to avoid traps and other extermination methods.
"The mutations were more frequent than previously expected." — JinJia Yu, Postdoctoral Fellow, Rutgers University
Context
The study coincides with New York City's intensified efforts to reduce rat populations through sanitation, inspections, and extermination campaigns.
Pest control industry professionals have noted that some treatments are taking longer to work than before.
Recommendations from Researchers
- Reduce reliance on pesticides and focus on prevention: proper trash storage, eliminating food sources, and improving sanitation.
- Preserve effectiveness of existing rodenticides, as developing new chemicals requires years and significant investment.
Attribution
The findings were reported by Rutgers entomologist Changlu Wang and postdoctoral fellow JinJia Yu.