ELIZABETH – that is an excellent question. I am not really sure, to be totally honest with you. This material is often referred to as totally ‘harmless’, ‘eco-friendly’ etc – but I don’t think people ever think of worms when they come up with these designations. Given the fact that it is like adding a heap of tiny glass shards, I would think that there might be a decent chance of this stuff being harmful – after all, if the hard exterior of an insect can get damaged, why not the soft body of a worm?
Hmmm…definitely something I myself would like to know the answer to.

Try boric acid, (simple powder form found at most stores these days and mix 1/3 boric acid, 1/3 peanut butter and 1/3 sugar and mix. As most ants can change their appetite wants and needs, this mix gets those looking for sweats as well as oily substances.

A mixture which is too weak will kill nothing. A mixture that is too strong will kill the ants prior to making it back to the nest hence not eliminating your problem.

The mixture above will permit the ants to pick up food and bring back to the nest, eventually killing off the colony.

If you try Sara’s comment above, be sure to place something under the legs on your deck as any oil will stain the wood, even if sealed.

Good Luck,

Bruce

Most of bin were located on top of a iron stand , dip legs in cans of oil ..any oil … water may cause mosquito breeding and may dried out if not fill up regularly. Using oil is a 1 time deal. Try it.