Why Are German Cockroaches So Hard to Exterminate

German Cockroach
German Cockroach

You don’t get to number one without having some mad skills. German cockroaches are the most common and plentiful roaches found in the United States. These stubborn and resilient pest can enter your home in a wide variety of ways. They bring disease, can survive months without food, and go without water for up to two weeks. By contaminating common household dust with their feces, they can set off allergic reactions and asthma attacks in people with respiratory problems. Why are they so difficult to eliminate?

Adaptability

Scientist at North Carolina State University have shown that the German cockroach has now evolved to dislike the taste of the glucose used in bait traps. This glucose sets off a reverse trigger of bitterness in the taste buds of the roaches. They are repelled by the sweet taste of the glucose because it is perceived as bitter to them. This neural mechanism has a genetic basis and is passed on to the offspring. It is one reason these pest have become harder to kill over the past few decades.

Multiply rapidly

Consider this math: A female German cockroach can have as many as 300 offspring. These offspring reach sexual maturity in 60 days. If half of the roaches produced are female, and each of them produce 300 baby German cockroaches… It is theoretically possible for one female German cockroach to result in more than 100,000 cockroaches in a year, according to the University of Nebraska–Lincoln.

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