Scientists argue that bed bugs have become more resistant to insecticides. Based on a new study published on April 10 in the Journal of Economic Entomology, two well-known insecticides used to annihilate bed bugs were proved to be less effective. In the last 15 years, the US faced a rebound of bed bugs. People have been trying to eliminate these pests from their homes which are known to cause itchy red welts.
Scientists indicate a new study reveals that bed bugs became resistant to powerful pesticides
These pests have developed resistance to several powerful pesticides, like DDT. Thus, exterminators started to rely on two powerful chemicals, bifenthrin, and chlorfenapyr. Ameya D. Gondhalekar, who is one of the study authors and also a research assistant professor at the Center for Urban and Industrial Pest Management at the Department of Entomology at Purdue University, claimed that up to this point, no one has studied whether bed bugs were developing any resistance to these insecticides.
Gondhalekar together with his team has collected ten different groups of bed bugs from different parts of the country and exposed them to both chemical substances in a glass vial. After a few days, they had observed the effectiveness of the chemicals. Most of the bed bugs were annihilated by the powerful substances, but, nevertheless, three types managed to thrive after being dosed with chlorfenapyr. Other five groups proved to be resistant to bifenthrin.
Some groups of bed bugs are immune to bifenthrin and chlorfenapyr
The study concludes that while some of these pests are bound to respond to these insecticides, others will not, but most likely many of these groups of bed bugs will become resistant to these pesticides in time. Michael Hansen, a senior scientist at Consumer Reports , argued that the study proves that the pesticide only approach is not working when trying to annihilate such bugs.
If you would like to know how to prevent the spread of bed bugs, specialists offered some useful advice. Gondhalekar claims that it is important that, if they already exist in your house, to be traced as early as possible. If their number grows to hundreds, then it will be harder to get rid of them. Usually, they hide in cracks in boxes, luggage, and walls. Nevertheless, their favorite place seems to be the bed.
Firstly, you need to inspect the mattress and the bed sheets and make sure you encase the box spring, the pillows, and the mattress with a protective cover to prevent them from spreading.
Image source: flickr