I am wanting to know which kitchen item I can use to pour or place into standing water that pools up near my house. I have no interest in any peddled commercial product whatsoever, I don't care how advertised as 'non-toxic' it is. If it is not intended for humans to eat then I don't want it in the chooks and their eggs which I do eat. I did pour out a container of cooking oil which had been sitting about on the shelf for some time, that seemed to annoy the living daylights out of the pesky little whatnots. There are not just the wrigglers, there are dozens per square meter that buzz back and forth over the surface. When they get to breeding age they are very big nasty things. A plant would also be ok, I could put something like that into the water, but absolutely nothing that you buy unless it is intended to be human food, because that is what it will become immediately in the food chain. Unless it is a plant I can grow in the garden. Has anyone been successful at this before ? how did you go ?