Depends how fast you need them killed. If you can give it a few days, Amdro will get them -- takes about a week for ants to gather and ingest the bait. A pound will do an acre, btw. If you need them dead in a few hours and know where all the mounds are, use Orthene, a white powder that you sprinkle on the mound. Orthene is a contact-kill, which sticks on ants' waxy exterior when they walk through it; then they track it deep into the mound, where it rubs off on the tunnel walls and the other ants which they contact. You can even start with the bait first, give it a few days and hit any surviving mounds later with the contact-kill.
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Fire ant mound treatment?
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Originally posted by tvc184 View PostI use Orthene from Ortho. It is a white powder and takes very little (I think a tablespoon) to kill a mound. Sprinkle it on while it is dry and about 24 hours later, no ants.
I have not had a problem with reappearing until the next year.
If it is a sunny day, the ants will have their eggs just beneath the surface of the mound. Kicking the dirt away and sprinkling the eggs with the powder wipes the mound out.
If you have a broadcast sprayer, it does not take much for 1.5 acres. That method will work. Then you can spray the perimeter to keep them out, as they will want to move in to fresh territory.
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A little goes a long way..
Originally posted by tvc184 View PostI use Orthene from Ortho. It is a white powder and takes very little (I think a tablespoon) to kill a mound. Sprinkle it on while it is dry and about 24 hours later, no ants.
I have not had a problem with reappearing until the next year.
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