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Have Fire Ants Met Their Match?10-30-06 | News

Have Fire Ants Met Their Match?




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Researchers in Texas are using parasitic phorid flies to control fire ants without using pesticides. The fly larvae develop inside of the ants and kill their host.


Parasitic flies introduced to control red imported fire ants have spread over four million acres in central and southeast Texas since the flies’ introduction in 1999, researchers at The University of Texas at Austin have discovered using new flytraps they developed. These initial results are seen as a promising beginning in the researchers’ efforts to control the fire ants.

Researchers at the Brackenridge Field Laboratory (BFL) have released multiple species of the parasitic flies, originally from Brazil and Argentina, to control invasive fire ants without pesticides. The fly larvae develop inside the ants and kill their host.

Ed LeBrun, a researcher at BFL, developed the new flytraps that allowed him to map the spread of the first species of phorid fly successfully introduced. The fly, Pseudacteon tricuspis, was introduced to several locations in Texas beginning in 1999 with BFL in central Austin.

The small traps capture fire ants first by luring them in with ants from a disturbed mound. The flies follow the ants into the traps and then become stuck on strips of flypaper when they take a break from attacking their victims. Researchers place traps around fire ant mounds along roads and analyze the flies they catch.

They have found the introduced phorid flies attacking imported fire ants in more than 12 counties and 3.5 million acres in Central Texas and seven counties and 1.5 million acres in the Coastal Bend region of Texas.

Source: Pest Control Buzz Newsletter

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