Fire ants have been laying low this summer, retreating to the cool of their homes deep
in the soil. But as the days grow cooler, fire ants find renewed vigor.
It may be hard to see the good news in reactivated fire ants. Active fire ants often
swarm onto people who venture too close to their nests. They inflict many stings at once
that can fester and stay painfully inflamed for days.
Red Imported Fire Ant |
But there’s good news, said University of
Georgia expert Beverly Sparks. Simply put, fire
ants are easier to kill in the fall.
“Fire ants are both closer to the soil surface and more actively foraging for food
when daytime temperatures are between 70 and 85 degrees,” said Sparks, an
UGA College of Agricultural and
Environmental Sciences.
Both traits are important. If you’re using a contact or drench insecticide treatment on
a single fire ant mound, Sparks said, it’s critical to do it when the queen and brood are
close to the surface. And if you use any kind of fire ant bait, you have to put it out
when the ants are foraging for food.
Actively foraging ants will pick up a bait and carry it into the nest within minutes,
she said. That’s important. If the ants don’t find the bait quickly, it will become rancid
and unattractive to them.
“If you put a bait out when it’s too hot or cold,” she said, “it’s just
going to sit there.”
The window for treating fire ants in the fall is narrow, though. As the fall deepens
and winter drops temperatures below the ants’ ideal range, they move back down in their
nests and become less active again.
Sparks said treatments to get rid of fire ants vary greatly, hinging on specific needs.
County Extension agents have the expertise, she said, to suggest the best treatments for
individual situations.
Just call the Extension office and explain how many mounds you have and where they are.
The county agent can tell you which of the many treatments would be best for you.
