Das Versprühen von Hinterhofmücken kann die Insektizidresistenz bei Tigermücken fördern, wobei sich Resistenz-assoziierte Mutationen von 0 der beprobten Wohnblöcke in den Jahren 2016–2017 auf 84 % im Jahr 2023 ausbreiten und in wohlhabenderen Gegenden häufiger auftreten

>The research centers on pyrethroids, a class of insecticides commonly used to kill adult mosquitoes. Pyrethroids are relatively inexpensive and considered among the safer insecticides for use around people, pets and homes. In places where mosquito-borne diseases are common, pyrethroids can play an important role in limiting transmission. In North Carolina, however, they are often used to reduce nuisance biting.
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>The researchers found that mosquitoes in Wake County developed and maintained mutations associated with pyrethroid resistance. One study used archived mosquito samples from 2016 to 2024 to track how quickly one of those mutations appeared and spread. The other examined whether socioeconomic factors helped predict where insecticide resistance was most common.
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>The researchers found no resistant mosquitoes in their Wake County samples from 2016 and 2017. The first resistant mosquitoes appeared in 2018 in a small cluster. By 2023, resistance had spread widely across the sampling area: researchers found resistance-associated mutations in 84% of sampled residential blocks, and 39% of sampled mosquitoes carried the mutation.

>The second study found that resistance was higher in neighborhoods with higher total property values, which researchers used as a proxy for homeowner wealth. The researchers did not directly measure household insecticide use, but the findings suggest that wealthier households may be more likely to use private mosquito-control services or other chemical insecticide treatments, creating localized selection pressure for resistance.
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>The researchers used a genetic screening method to identify a mutation in the mosquito’s genome. This mutation is associated with “knockdown resistance,” or kdr, which can reduce mosquitoes’ sensitivity to pyrethroid insecticides. “This mutation is often the first to show up when there’s insecticide resistance,” Burford Reiskind said.

[Emergence and spatial distribution of knockdown resistance in a suburban population of Aedes albopictus | Parasites & Vectors | Springer Nature Link](https://link.springer.com/article/10.1186/s13071-026-07519-6)

[Socioeconomic predictors of knockdown resistance in the globally invasive tiger mosquito Aedes albopictus | Royal Society Open Science | The Royal Society](https://royalsocietypublishing.org/rsos/article/13/7/251678/482487/Socioeconomic-predictors-of-knockdown-resistance)

Blindingly obvious given everything we know about biology

I’m still going to spray the dogs’ half of the yard. Ticks and other critters can move to the other 75% of my yard, just stay off my dogs.