Wisdom cockroaches know how to avoid food with baits

Cockroaches are very wise, knowing actively rejecting glucose often contains poisonous baits. They redefine: the sweetness from now is bitter.

>>>Humans will perish before cockroaches?

The study, conducted by US scientists at the University of North Carolina, is published in the latest issue of the journal Science.

Over the past few years it has been recognized that the brown cockroach living in the house (scientific name Blatella Blatella) actively abandons the sweetness contained in poisonous baits. Scientists said that because the previous generations of cockroaches died too much because of the appeal of sweetness, they actively changed their taste.

At first, the scientists saw cockroaches that were very hungry when choosing between peanut oil and jam, saturated glucose, which they previously liked the most, all chose oil but turned away from jam. They then caught some cockroaches and attached them to their mouths with tiny electrodes, allowing them to determine which neurons were stimulated when the cockroach approached the glucose.

As a result, when cockroaches are forced to come into contact with sweetness, activated neurons are neurons responsible for sensing bitterness. It is the neuron that is stimulated when cockroaches must 'taste' typical bitter substances such as caffeine, quinine . That experiment proves that even though glucose affects the receptors that sense sweetness, this receptor has been locked up by them. to switch to bitter taste neurons.

During the study, people saw cockroaches turning their heads away to avoid the previously attractive special glucose drops for them. According to scientists, changing the working function of cockroach receptors is an example of the effectiveness of natural selection process. Mr. Cobey Shell, one of the authors of the article, said: 'I always feel very impressed with cockroaches. They not only depend on us but also know how to deceive us. '