Study: Mosquito repellent may actually attract mosquitoes if used incorrectly

New research from French scientists suggests that mosquito repellents can backfire if used inconsistently or incorrectly. Rather than deterring mosquitoes, the repellent scent may become associated with food, drawing insects closer. The findings are timely as Estonia's mosquito season approaches.

As Estonia's mosquito season draws near and people reach for insect repellents, new French laboratory research offers a surprising warning: using repellent incorrectly could actually attract the very insects you're trying to avoid.

The study, conducted by French scientists, found that when repellent is applied inconsistently or in a patchy manner, mosquitoes may begin to associate the repellent's scent with a food source rather than a deterrent. In laboratory conditions, insects that were repeatedly exposed to the repellent smell alongside a feeding opportunity eventually stopped treating it as a warning signal.

The implications are significant for the millions of people who rely on chemical repellents during warmer months. Experts have long recommended applying repellent evenly across all exposed skin, but many users apply it only partially or irregularly — precisely the conditions that, according to this research, could condition mosquitoes to seek out rather than avoid the scent.

Scientists emphasize that properly applied repellents remain effective, and the findings do not mean people should abandon their use altogether. Rather, the research highlights the importance of correct and consistent application to ensure the product works as intended.