家里撒了蟑螂药，但蟑螂依旧猖狂？最新研究发现，蟑螂对多种杀虫剂产生了交叉耐药性，而且这种耐药性在一代之内提高到之前的6倍。

Cockroaches are stepping up their defenses against the poisons designed to kill them.

蟑螂对杀虫剂的防御机制正在加强。

A new study has found that German cockroaches, the most common species of the insect in the world, are developing cross-resistance to numerous insecticides.

最新研究发现，全球最常见的蟑螂种类德国小蠊正对多种杀虫剂产生交叉耐药性。

cross-resistance：交互抗性

Not only were researchers in some cases unable to reduce cockroach numbers during a six-month study period, even when combining different insecticides, but they found the insects' resistance increased up to six-fold within one generation.

在某些情况下，研究人员不仅无法在为期半年的研究期间杀灭部分蟑螂，甚至使用了多种杀虫剂也是如此，而且他们发现，蟑螂的耐药性在一代之内提高到之前的6倍。

'This is a previously unrealized challenge in cockroaches,' said Purdue University professor Michael Scharf.

普渡大学教授迈克尔·沙夫说：“我们之前在蟑螂身上从未遇到过的挑战。”

'Cockroaches developing resistance to multiple classes of insecticides at once will make controlling these pests almost impossible with chemicals alone.'

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