The rise of bedbugs in the last few decades could be due to their resistance to insecticides.
A study published in the Journal of Economic Entomology found that bedbugs are showing lower susceptibility to two common pesticides.
Researchers examined how much insecticide it took to kill each strain of bed bug and how long it took for them to die after exposure. Researchers found the concentration needed to kill one of the test populations was higher than the control group.
The control bed bugs died three to seven days after exposure to the different pesticides.