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In a study published last month in the journal Scientific Reports, researchers cloned a common eradication method in about 100 apartments, and found that almost none of them actually eradicated the cockroaches in Germany.
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Michael E. Scharf, professor of entomology at Purdue University, said, “Cachroaches that have developed resistance to several types of pesticides at one time will not be able to control these pests with chemicals alone.”
Scharf's team found some cockroaches counting more cockroaches over time.
Cockroaches (in addition to gross) can produce allergens that worsen asthma and sometimes carry dangerous bacteria such as Salmonella or Escherichia coli. If insects persist despite pesticide treatment, continued use of pesticide chemicals can pose a health risk.
Scharf has been observed pesticide resistance.
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Real fear is a term that refers to cross-resistance, the ability of creatures to survive and thrive despite a number of ways of eradication. Cockroaches appear to develop these characteristics. – In the study, new cockroaches were born resistant to pesticides they had not met.
In their study, Purdue researchers applied three different treatment methods in six months to a community of apartment buildings in Indianapolis and Danville, Illinois, mimicking the pest management strategy common to urban public housing.
None of the three methods completely got rid of cockroaches.
The first remedy involving pesticides with a single active ingredient was the only way to reduce the number of cockroaches, and it only occurred in apartments where the cockroach began with a low level of resistance to the ingredient.
In the second remedy, a roach remover product with a mixture of various active ingredients was used. The result: an increase in cockroach populations in apartments in both cities. The cockroach spread to previously uninfected apartments, causing researchers to switch to other eradication methods in accordance with ethical protocols.
The third technique involves rotation through different pest control treatments with different active ingredients. The logic of this approach is that the cockroach that resists the first treatment method is reliably eliminated by the following method. But that's not true. The researchers believe that the bug is due to the development of cross resistance. Roaches that survived after one treatment passed resistance to offspring, and the population was able to survive various types of treatment.
In a statement, Scharf said, "we will increase resistance four or six times in a single generation." "We had no clue that this could happen so quickly."
Household cockroaches have developed resistance to common insecticides since the 1950s, but infection of insecticide-resistant super cockroaches is a new problem.
Scharf and other researchers have proposed a pest management method that combines chemical pesticides and traps, sanitary efforts, and even structural modifications of buildings for those who face this problem in their homes.
"Some of these methods are more expensive than using only pesticides, but throwing money away if pesticides don't control or eliminate the population," Scharf said.