I wonder why they don’t like the smell of DEET. It’s not a learned behavior, so it must be hard wired, but since DEET hasn’t been around long enough to affect evolution, it must smell like something else that they developed an aversion to as a species. Perhaps some prey whose blood doesn’t agree with them?
Interesting. I always thought DEET poisoned the little bastards. On occasion I have gleefully sprayed DEET on clouds of mosquitoes with the misconception that I was killing them; now I’m disappointed. I wonder if they’ll be able to concoct a less toxic (to humans) version of DEET.
(I removed the reference numbers for readability.)
I know there are those who swear that they have various negative reactions to DEET, but the best scientific evidence does not appear to support anything but an extremely low level of toxicity.