Daily Archives: March 13, 2015

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Patrick Guilfoile: Eternal rest for bedbugs | Bemidji Pioneer

Posted on March 13, 2015 by admin Click Here For Article

Posted on Mar 8, 2015 at 12:40 a.m.

Consequently, measures are urgently needed to determine whether bedbugs are present in a dwelling, in order to implement control measures. Yet these small creatures are notoriously difficult to find, and current methods for detecting bed bugs are somewhat clunky and expensive.

The good news is that researchers from Simon Fraser University in Canada recently reported the recipe for the signal that bedbugs use to find one another.

This should make it much easier to rouse the little critters from their hiding places and determine whether they are causing an infestation, and it might also be useful for exterminating them.

The first step in conducting these experiments was to grow a colony of bed bugs. This was a challenging prospect, as bed bugs only feed on blood. One of the scientists in the study, a member of a husband and wife research team, volunteered her arms for nearly 200,000 bites to keep the colony healthy and growing. (Her husband apparently wasnt a suitable donor, as he developed a severe itch when bitten.) As a consequence of all this feeding, the bed bugs produced a large volume of shed skin and feces, which was the raw material for isolating the aggregation signal.

The scientists used chemicals to extract the key components that caused bed bugs to aggregate from 18,000 of their shed skins. It took about 18 months to collect the number of skins needed for their experiments.

They also allowed 300 bed bugs to poop on pieces of paper for a month, and then analyzed the fecal material contained on the paper with a machine called a gas chromatograph/mass spectrophotometer to detect the various individual components excreted by the bed bugs.

To test whether they found the correct compound, the researchers put bed bugs in a central round glass container, connected by small tubular passageways to two other containers with either a control scent or a test scent they had extracted from bed bug skin and feces. They then allowed the bed bugs to roam the chambers overnight, and determined where they ended up the next morning. If the bed bugs were attracted to the test scent over the control scent, the researchers knew they were on to something. By testing a variety of compounds isolated from the bed bug skins and feces, the researchers ultimately determined that a cocktail of histamine plus five other volatile chemicals was sufficient to attract and keep bed bugs in place. As the final test, the scientists went into infested apartments in Vancouver, British Columbia, and determined that their scent mixtures did effectively attract bed bugs in the wild.

This research will hopefully lead to more effective ways of detecting and eliminating bed bugs from a dwelling, and thereby eliminate the rashes and sleepless nights experienced by people who share their homes with these nasty little creatures.

More information is available in the article by Regine Gries and others entitled Bed Bug Aggregation Pheromone Finally Identified in Angewandte Chemie 54: 1135-1138, January, 2015.

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Patrick Guilfoile: Eternal rest for bedbugs | Bemidji Pioneer

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Bed bugs discovery closes Rogersville senior center, library

Posted on March 13, 2015 by admin Click Here For Article

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March 12th, 2015 12:33 pm by Jeff Bobo

ROGERSVILLE - The Rogersville Senior Center and H.B. Stamps Public Library, which share a building in downtown Rogersville, were evacuated Thursday around noon afterbedbugswere detected during a routine pest inspection.

Hawkins County Mayor Melville Bailey said a pest control contractor reported that the bed bugs were discovered in the hallway that connects the senior center and the library.

That hallway is carpeted, has cloth furniture, and contains restrooms used by both the library and senior center.

(The exterminator) thinks the bedbugs are confined to the foyer, Bailey said. We called the state health department and they recommended we close the senior citizens center and the library since they are adjoining.

Bailey said the pest control inspection Thursday was routine and there were no previous complaints of infestation prior to the exterminator's report late Thursday morning.

About 25 people were in the senior center when the evacuation was ordered. To his knowledge, no one from the library or senior center has complained of bites, Bailey added.

As seniors left the Senior Center they were informed of Health Department recommendations on how to prevent spreading an infestation.

Seniors were told to go home, remove their clothing, place it in a bag, and take a thorough shower. Then they should wash the clothing in hot water and then dry it in a dryer on the hottest setting.

The rest is here:
Bed bugs discovery closes Rogersville senior center, library

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Buy Bed Bugs Control Product at Economic Price – Pestmall

Posted on March 13, 2015 by Pest Controller Click Here For Article

Q. I have a blanket and a through and a sheet on my bed, do I have to dispose of them or could I clean them with something and save them?

A. You can wash the items in hot water in order to kill any bed bugs. The ideal temperature for treatment is about 113-115 degrees Fahrenheit.

Q. Resistance Unraveled

I read recently in a trade magazine that bed bugs are building up a tolerance to pyrethrins. How does this happen? If a bed bug is killed by a pyrethrin it's dead. How do the other bed bugs begin to build up a tolerance? How do bed bugs in another location build up a tolerance?

We can blame Natural Selection at the increasing resistance of a number of insects to pesticides. Biological traits and natural adaptation are the reasons why a number of weeds are resistant to some herbicides and some rodents still survive after digesting rodenticide-laden food or traps. The same can be said of people who seem to have better immune systems.

In the case of common, there are studies and proof that they have become resistant to synthetic pyrethroids. Synthetic pyrethroids are man-made version of pyrethrin and are made from petroleum derivatives. Pyrethrin, on the other hand, is an organic compound that attacks and paralyzes insects' nervous systems. Over the years, the insecticide industry has been dependent of synthetic products and in effect helping produce the next generation of bugs which are immune to its effects.

While pyrethrin is a better choice, there have been studies that showed cockroaches recovering from pyrethrin treatments. Recent insecticides that contain pyrethrin are now manufactured with one or two synergists for added efficacy. Other studies have shown that bed bugs have become immune to the deadly effects of dichlorodiphenyltrichloroethane (DDT), a water soluble insecticide. And since pyrethroids and DDT share some similar modes of action in attacking nervous systems of insects, a number of bugs are also considered immune to pyrethroids.

However, the concern of most people is the effect of synthetic pyrethroids, Are they still effective against insect infestation? Can synthetic pyrethroids create "super bugs"? The answer is yes and no. The bugs may look like they are adapting to the affects - some species are hardly taken down by the treatments, while others take longer or stronger doses to die. What we are seeing is the survival of the fittest, their genetic composition may have the capability to block certain effects of the insecticide. When these surviving bugs reproduce, their offspring are likewise resistant to the insecticide.

It travel by breeding and finding temporary shelter in clothing. From there they could set up shop in almost anywhere in the country. Their survival has always depended on moving and breeding in places that could give them the most ideal living conditions and food sources. Their ancestors have survived through this strategy and must have passed on genes that have better resistance on the effects of pyrethroids.

Dr. Mike Potter of the University of Kentucky said that some populations of the common bed bug have shown 1000x factor of resistance to synthetic pyrethroids. This means that the effect of the said compound is likely to have no effect of the target insects.

Read more from the original source:
Buy Bed Bugs Control Product at Economic Price - Pestmall

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