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Ant Control >>

New Virus Targets Fire Ants

POSTED: May 27, 2007 10:01 am
New Virus Targets Fire Ants

In the South, red imported fire ants (RIFA) are unwelcome at everybody's picnic. This tiny South American native has already infested about 300 million acres in the United States, thriving in the absence of natural enemies. It inflicts a painful sting that is sometimes deadly to humans, as well as to young, unprotected livestock and wildlife. Estimates put the annual costs of RIFA-caused damage at hundreds of millions of dollars in the United States alone.

Now, the first viral infection of RIFA has been discovered caused by a relative of the well-known picornalike viruses. Tentatively named Solenopsis invicta virus-1, or SINV-1, the organism seems promising as a potential biological control agent for the ants. Researchers have already sequenced the virus's genome, and a survey of Florida locations has found that more than 20 percent of ant nests were infected with SINV-1. The virus infects all fire ant castes and stages of development, and it has been successfully transmitted to uninfected RIFA nests.