On Thu, 19 Jan 1995, Steven Klitzing wrote:
> Hi Becky:
>
> If you want to prevent mosquitos from getting into your
> rainwater supply barrel...Take an eyedropper and add two
> or three drops of motor oil or 3 and 1 oil to the surface
> of the water. It will create a thin surface film of oil
> that will prevent any mosquitos from hatching...as it
> suffocates their eggs in the water. Simply skim it off
> the top with a disposable rag when you want to use the
> water.
>
> ---Steve