I have a pretty bad ant infestation. I think the little critters are Argentine ants. I've used a couple of bottles of Terro (I usually put down about a quarter bottle at a time). It does slow them down, but they come right back not after not too long.
I have been thinking about using an aerosol insecticide. The stuff I have has imiprothrin and cypermethrin as active ingredients. The are supposed to be good enough that I can just spray on their trails, and they'll die if they walk over the sprayed areas.
The problem is the location of the trail. They're coming out from a space between the baseboard heater and the wall's outer finish.
Can I spray the baseboard heater? I'm not worried about fires, but I'd really hate for the insecticide to start outgassing when the heaters get turned on this winter.
Best Answer
You should lay a bait down. I recommend Advion, which is a product from DuPont or MaxForce, which uses fipronil. You can do a search on Amazon or a similar site for "Advion ant" or "MaxForce ant". The bait comes in a plunger that you can use to apply in small places. Find out where they are trailing and put a few drops down. You can put the drops on paper if you are worried about your finish. Every day (or couple of hours if you have a bad infestation) check to see if the bait's gone and reapply. It may take a couple of weeks to kill them all.
As far as Terro goes, I haven't had much luck with it either. The attractant in Terro's all sugar-based from my understanding. The ants may be feeding on Protein now.