There are several ways to kill cockroaches. Some pesticides are effective against roaches, and others are not. It is important to know what you’re dealing with, since roaches have evolved to be resistant to insecticides. A roll of newspaper won’t do the trick.
The majority of cockroach species don’t produce poison. Some species can sting and injure humans. Others have an allergy to cockroach venom. Some are even known to crawl into a person’s ear. This is a minor annoyance, but it’s worth noting – a cockroach bite won’t kill a human.
Cockroaches can be dangerous if they’re poisoned by the spray used to kill them. Boric acid has the most potential to kill people if it enters the body. Boric acid poisoning usually occurs when a person swallows a roach spray or powder. The poison is not toxic in small amounts, but it can cause permanent damage. Boric acid is slow-acting, which means that it takes 72 hours to kill a cockroach.
The American roach is known to bite 50 times its body weight. Moreover, it runs like the wind across ceilings. Researchers who tested this species by giving them a bite device were able to chip their distal teeth.