The best way to kill fruit flies is to keep your air conditioner at a low temperature, such as 55 to 60 degrees Fahrenheit. This will stop their systems from functioning, causing them to fall to the floor. This will also make it very difficult for them to survive in your home. In addition, they will cease to flutter once the temperature is below 68 degrees Fahrenheit.
If you are unable to maintain these conditions, you can buy an incubator and keep your fruit flies in it. These incubators are a great way to keep fruit flies warm. While they are expensive, they’re worth the money. They won’t die immediately, but they will survive longer if you keep them in warm environments. Cold temperatures can kill off their pupae and larvae, but they will return to reproductive activity as soon as they get a warmer environment.
Another option is to clean drains, scrubbing them with a stiff brush. You can also pour boiling water down the drain. Regardless of whether you opt for a bacterial drain treatment or an ammonia-based drain cleaner, you should make sure that fruit flies don’t breed in your drain.
However, even though fruit flies don’t die in the winter, cold temperatures can stunt their development. When temperatures drop below 60degF, they stop developing and will begin to look for a warmer environment.