don't know about worm, but came across this one _ get rid of flies
ZIPLOC BAGS: BELIEVE IT OR NOT - they repel flies, try it!.
Go ahead and try it you have nothing to loose !!!!!!!!!!!!!!
We recently went out to a restaurant with some friends for Sunday breakfast, and while we sat in the patio, we happened to notice ZIPLOC baggies attached to the restaurant's patio wall. The bags were half-filled with water, each bag contained four pennies, and were all zipped shut. Out of curiosity, we asked the waiter about the baggies. We were told that they kept the flies away. Naturally, we became even more curious. So we actually watched. Sure enough, some flies came in the open window, and then flew out again, and there were absolutely no flies in the open patio eating area the entire time we were in the restaurant!
Upon getting home, I checked it out on Google and saw several comments from various people who swore that ZIPLOC baggies half-filled with water and a few pennies when attached over entryways will repel flies. Some commented that it also works for wasps.
One particular comment on Google shed light on how and why it works. The comment posted on 5/26/2009 said: My research found that each of the millions of molecules of water presents its own prism effect and given that flies have a lot of eyes, to them it's like a zillion disco balls reflecting light, colors and movement in a dizzying manner. When you figure that flies are basically prey for many other bugs, animals, birds, etc., they simply won't take the risk of being around that much perceived action. I moved to a rural area and I thought these "hillbillies" were just yanking my city boy chain but I tried it, and it worked immediately. We went from hundreds of flies to seeing an occasional one, but it didn't hang around long.
This is surely a new twist to fly control. It's hard to believe, but it works. If you have problem with flies, it would be worth a try. We don't have many flies, but one is one too many.