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Natural fungus may provide effective bed bug control
Date:11/20/2012

. The researchers found that all of the bed bugs exposed to the biopesticide became infected and died within five days.

Also, there were no prominent differences in susceptibility by feeding status, sex, strain or life stage. Most importantly, the infected bed bugs carried the biopesticide back to their hiding places, infecting those that did not go out in search of blood.

"We exposed half of a population of bed bugs to a spray residue for one hour and then allowed them to go into a harborage with unexposed individuals," said Jenkins. "The fungal spores were transferred from the exposed bug to their unexposed companions, and we observed almost a hundred percent infection. So they don't even need to be directly exposed, and that's something chemicals cannot do."

This result is important because bed bugs live in hard-to-reach places.

"Bed bugs tend to be cryptic, and they'll hide in the tiniest crevices," said Jenkins. "They don't just live in your bed. They hide behind light switches and power sockets and in between the cracks of the baseboard and underneath your carpet."

The speed of mortality with B. bassiana is as fast as Jenkins has seen in any application, but it doesn't even need to be that fast.

"If you are trying to protect a farmer's field, he wants the insects that are eating his crop dead immediately," said Jenkins. "Obviously, if you have bed bugs in your house, you don't want them there for any longer than you have to, but what you really want to know is if they've all gone at the end of the treatment, and I think that's something that this technology could offer."

Next, the researchers will test the effectiveness of brief exposure times and look at entire populations where natural harborages are established. Then they will begin field work.

"It's exciting, and it definitely works," said Jenkins. "We're working on the next step, and we have more funding to support these studies."


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Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
Source:Eurekalert  

Page: 1 2

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