The fungus Entomophthora muscae has a survival strategy that's both fascinating and potentially going to put you off your next meal: it infects and 'zombifies' female houseflies before sending out irresistible chemical signals encouraging male house
, or chemical messages, which are synthesized in the female cadaver and sent out as a seductive signal. Based on the experiments carried out by the researchers, the longer the corpse has been dead, the more attractive it appears to be to the males.
"The chemical signals act as pheromones that bewitch male flies and cause an incredible urge for them to mate with lifeless female carcasses,"has infected a female fly with its spores, it starts to multiply. After around six days, it can control the behavior of the insect, sending it up to the highest possible point before it dies. Fungus spores are then sent out from the dead fly, hoping to land on another.
The team used a variety of chemical analysis and genetic sequencing techniques to figure out exactly what the fungus was doing, as well as exposing male flies to female partners at different stages of fungal infection, or that had died from other causes.says H. De Fine LichtTests showed that female fly corpses that had been dead for 3-8 hours attracted 15 percent of male flies, whereas with corpses that had been dead for 25-30 hours, that figure shot up to 73 percent.
There are plenty of opportunities for further research here, not least into effective fly repellents – flies can with various diseases, and sesquiterpenes could be used to lure flies away from certain areas, such as where food is being prepared.
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