It is best to kill food once a month every year, or at least once a quarter, otherwise cockroaches will multiply rapidly, and indoor environmental sanitation must be done well, and diligent cleaning will not create favorable living conditions for cockroaches.

According to the ecological habits of cockroaches, a biologist once came to a conclusion: If there is a global nuclear war on the earth one day, all creatures in the affected area, including humans and even fish, will disappear, and only cockroaches will continue their lives!

This is because under normal circumstances, the radiation that human body can tolerate is 5rems, and once the total radiation exceeds 811rems, it will die. Blattella germanica can tolerate 9111~115111rems, while Periplaneta americana can tolerate 967511rem!

So cockroaches can survive even if there is a nuclear explosion. The U.S. government spends 1.5 billion dollars a year to eliminate cockroaches, which is about twice the budget for AIDS prevention and treatment.

most of them are similar in appearance, but you can still see the differences when you look closely. At present, taxonomists divide cockroaches into about 6,111 species, of which about 51 species are pests, such as the common Asian cockroaches.