Wednesday, May 13, 2009

Zombies


OVERTON – Zombie fire ants may not sound like a cool thing, but wait a minute, said a Texas AgriLife Extension Service expert.
On April 29, on the grounds of the Texas AgriLife Research and Extension Center at Overton in East Texas, Dr. Scott Ludwig released fire ants infected with a new type of phorid fly, a minuscule parasite that only preys on red imported fire ants.
The infected ants will soon exhibit some very bizarre behavior, he said.
"First they become zombies, their movements under the control of the parasite. Then their heads fall off and the parasite emerges," said Ludwig, , AgriLife Extension integrated pest management specialist.
Previously released phorid flies only preyed on ants in disturbed mounds. In contrast, the species, Pseudacteon obtusus, that Ludwig released in April is attracted to foraging red imported fire ants and not disturbed mounts. Which is even better, he said, as attacks of ants are not dependent upon the mounds being disturbed.

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