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Cockroaches, increasingly resistant to pesticides

Cockroaches, increasingly resistant to pesticides

Alarmingly, scientists warn that cockroaches are developing resistance to insecticides and that it will soon be "almost impossible" to control them with chemicals.

Cockroaches in battle against pesticides

A recently published study by scientists at Purdue University, in Indiana, USA, warns that the German cockroach variety (Blattella germanica L.) is developing resistance to insecticides.

TheBlattella germanica L., is one of the most widespread pests in cities around the world, it showed resistance to various insecticides.

The scientists experimented with pesticides that are for sale to the public and some that are used by spraying companies.

While cockroach control is key to maintaining human health because they are bacteria-spreading agents and their droppings can cause allergies and asthma, conventional chemical methods are failing to work.

Cockroaches are developing resistance to multiple classes of insecticides at the same time, which in the future will make controlling this pest almost impossible with chemicals alone.

And then how can a pest be controlled?

Resistant cockroaches tend to prefer places where there is food such as kitchen surfaces, shelves or stoves, so they can spread pathogens of salmonella and E. coli, which cause severe stomach upsets and diarrhea.

When an insecticide stops working, one of the study authors Ameya D. Gondhalekar advises against resistant cockroaches:

  • Frequently clean areas where dust, heat, or food debris can collect.
  • Don't use the same insecticide over and over again. If the pest problem is not resolved after one application, the next should be with a new chemical, otherwise they will create resistance.
  • Repair leaks as they are the main sources of water for these insects.
  • Do not leave food exposed in the open air
  • Empty the trash can regularly.
  • Vacuum rugs and places that collect moisture.

With information from:


Video: Watch: Cockroaches Survive Squeezing, Smashing, and More. National Geographic (January 2021).