Cockroaches are becoming almost impossible to kill

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The German cockroach is one of the most common species of insect in the world and has developed a resistance to insecticides.

That’s according to researchers at Purdue University who applied various insecticides on three cockroach colonies over a six-month period.

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They found most of the roaches survived. In fact many built a resistance to the chemicals which they passed down to their offspring.

The study published in Journal Scientific Reports and concluded that roaches are becoming harder to get rid of.

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