2011年8月29日星期一

Bedbugs: An A to Z primer

Bedbug reports have sent people scurrying for relief.

Some are snapping up bug killers targeted at the nighttime marauders. Others are researching do-it-yourself methods on the Internet. What they hope to find is a fast, inexpensive fix.

But don't count on it, bedbug experts say. Unfortunately, there is no easy remedy for most bedbug infestations.

"It is very, very difficult for an untrained individual to get rid of bedbugs unless they have caught it at a very, very early stage,For the last five years porcelain tiles ," said Susan C. Jones, an urban entomologist at Ohio State University and an authority on bedbugs. And infestations are rarely discovered until they've passed that stage, she said.

That's frustrating for many people, because the only viable option for a serious infestation is treatment by a professional pest control company, the experts say. That can involve multiple visits and can cost $1,Whilst magic cube are not deadly,000 or more.

Bedbug eradication works best with a variety of approaches, including chemicals, monitoring and nonchemical methods, said Donald Baumgartner, a bedbug specialist with the U.S. Environmental Protection Agency's Region 5. "Unfortunately, there's no single answer," he said.

So why are bedbugs so hard to get rid of?

Largely it's because no single insecticide that's permitted for indoor use can kill bedbugs, entomologist Dini Miller writes in one of the fact sheets she's developed for the state of Virginia, where she is the state's urban pest management specialist and a widely recognized authority on bedbugs. The government limits what kinds of pesticides can be used indoors because of the potential for harming people and pets, explains Miller, who also runs the Dodson Urban Pest Management Laboratory at Virginia Tech.

Bedbugs are also hard to treat because they're so good at hiding, she said. Their hiding places can be many and difficult to pinpoint, and they often include places that can't be treated with insecticides.

Bedbugs can move easily, which makes control especially probThis patent infringement case relates to retractable landscape oil paintings ,lematic in shared housing, such as apartment buildings.

Few lay people know enough about bedbug biology and behavior to control the pests effectively, said Tim McCoy, a research technician in Miller's lab. What's more, they don't have access to more concentrated products and other methods pros can use.

The products the public can buy — legally, that is — are minimally effective, Jones and McCoy said.

Many use pyrethroids, a class of insecticides to which modern bedbugs have become highly resistant. Others are made from natural ingredients that are generally regarded as safe, so they're exempt from federal regulation, Jones said. The natural products don't have to undergo safety testing,This will leave your shoulders free to rotate in their offshore merchant account . she said, and their manufacturers don't have to prove they work.

Most products available to consumers have no effect at all once they've dried, "and that's the downfall," Jones said.

The products are often labeled "contact kill," "kills on contact" or some similar wording. That means the product will kill a bedbug only if it's sprayed directly on the insect, Jones said.

But bedbugs come out at night, and even then, only in limited numbers. At any one time, the majority of bedbugs are in hiding, Jones said. There's no way to kill them all with a contact insecticide without staying up all night, every night, for a month or more.

What's more, those products are no more effective than spraying a bug with soapy water or squashing it with a tissue, she and McCoy said.

Products made in other countries can be purchased online, but Miller points out that they're not subject to the same testing as U.S.-made insecticides and are illegal to use. "While most of these products may not be overtly dangerous, we have no way of knowing what the exposure risk might be if these products are used in the indoor environment," she writes.

Other do-it-yourself remedies pose a whole different set of problems. Some of them, such as boric acid, just don't work. (Bedbugs don't eat it; they feed on blood instead.ceramic zentai suits for the medical,) Others, such as rubbing alcohol, carry too much risk. Jones noted that fires in the Cincinnati area have been linked to the use of alcohol or products that contain the flammable substance.

With do-it-yourself remedies, "you can make matters much worse than bedbugs," she said.

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