Secret Site Map
Monday, May 25, 2015

Home News Bed Bug Resistance to Insecticides is Widespread

Bed Bug Resistance to Insecticides is Widespread

In a recent study, entomologists at the University of Kentucky College of Agriculture found the majority of bed bugs in the United States appear to have developed genetic mutations, making them resistant to pyrethroids.

| January 22, 2010

Editor’s note: The University of Kentucky College of Agriculture submitted the following press release about a new study the university conducted regarding bed bug resistance to pyrethroids. The majority of the funding for this study was provided by Bayer Environmental Science.

In a recent study, entomologists at the University of Kentucky College of Agriculture found the majority of bed bugs in the United States appear to have developed genetic mutations, making them resistant to the most commonly used insecticides called pyrethroids.

While there are many different types of pyrethroids, UK researchers have found once a bug is resistant to one, they are likely resistant to others in the same category.

Their findings will be published in an upcoming issue of the Archives of Insect Physiology and Biochemistry.

Fang Zhu, a post-doctoral fellow at UK along with fellow UK entomologists Mike Potter, Ken Haynes and Reddy Palli and several students, analyzed 110 bed bug populations from across the United States and found 88 percent of them had one or two genetic mutations. These mutations produce what is known as knockdown resistance, meaning the insecticide is not able to kill bed bugs.

"This study shows how widespread the problem is. It really brings home that this isn't just an isolated incident," Palli said.

Scientists in other countries have also found pyrethroid resistance in bed bugs on a smaller scale, so the resistance could be worldwide.

Potter said one of the reasons for the resistance could be that the bed bugs were previously exposed to pyrethroids before coming to the United States. Pyrethroids are used to combat many different insects and are used in mosquito bed nets to combat malaria.

Another possibility is the bugs developed resistance in the 1940s and 1950s when DDT was used for bed bug defense. Bugs that are resistant to DDT have the same target-site resistance as pyrethroids, Haynes said.
Currently, no insecticide or non-chemical practice alone is 100 percent effective in eliminating bed bugs.

"We need alternative insecticides to fight this bug," Potter said, "Unfortunately today's products are not as effective as ones we had previously. Non-chemical measures are important but are seldom completely effective and can be laborious and expensive. History has taught us insecticides are a crucial part of the bed bug solution."
Data from this study will help pest management professionals make future decisions.

"The methods and primers developed by this group could be used to tell pest control professionals whether or not pyrethroids work on certain bed bugs by looking for these genetic mutations in the bugs' DNA," Palli said. "If it's a target-site mutation, like the majority of these, spraying probably would be ineffective, but if it has another type of resistance, we could possibly add synergists to the current insecticide to help fight them."

Top news

Fastest Growing U.S. Cities in West And South, Census Bureau Reports

Most cities with populations above 100,000 in those regions grew significantly between 2000 and 2010, and 2010 and 2013, according to the bureau's report, which was released last week.

New Bee Survey Released

Losses of managed honey bee colonies were 23.1 percent for the 2014-2015 winter but summer losses exceeded winter numbers for the first time, making annual losses for the year 42.1 percent, according to preliminary results of the annual survey conducted by the Bee Informed Partnership, the U.S. Department of Agriculture (USDA) and the Apiary Inspectors of America.

Terminix Announces Top Mosquito Cities Based on Twitter Complaints

According to research by Terminix, the worst whining about mosquitoes came from Goodland, a small town in the northwest corner of Kansas. Terminix searched through approximately 200 billion tweets posted in 2014 to determine which United States city is most pestered by mosquitoes.

White House Releases Pollinator Action Plan

The Strategy, released last week, and its accompanying science-based Pollinator Research Action Plan outline needs and priority actions to better understand pollinator losses and improve pollinator health. These actions will be supported by coordination of existing Federal research efforts and accompanied by a request to Congress for additional resources to respond to the pollinator losses that are being experienced.

Legislative Day Video Coverage

More than 325 pest control industry professionals traveled to our nation’s capital in March for NPMA Legislative Day 2015, lead-sponsored by FMC Professional Solutions. In the day-plus of activities, PCOs attended sessions on important industry-related issues and heard from prominent national speakers before heading to Capitol Hill to meet with their congressional representatives. In addition to news articles, PCT’s coverage includes video interviews.

x