I have a problem here with small black ants nesting in my container plants that hang in the trees. I moved a hoya plant yesterday and hundreds of those little insects were scrambling out of the pot and all up my arms ... thank goodness those little black ones don't bite. I really detest fire ants and have been stung by them numerous times. I had an issue with the tiny Pharaoh ants in the kitchen one time but I sprinkled ground cinnamon outside the window where I think they were making entry and it worked ... no more ants!