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    英媒稱蟑螂耐藥性可快速增強4到6倍:滅蟑螂越來越難

    2019-07-03 06:35:01 參考消息網

    參考消息網7月3日報道 英媒稱,一項新研究發現,德國小蠊——全球最常見的蟑螂種類——正在對眾多殺蟲劑產生交叉耐藥性。

    據英國《每日郵報》網站7月1日報道,在某些情況下,研究人員不僅無法在為期6個月的研究期間減少蟑螂數量,甚至結合不同殺蟲劑也是如此,而且他們發現,這種昆蟲的耐藥性在一代的時間里提高了6倍。

    珀杜大學教授邁克爾·沙夫說:“這是以前在蟑螂身上未出現過的挑戰。”

    他說:“蟑螂同時對多種殺蟲劑產生耐藥性將使單純利用化學物質控制這種害蟲變得幾乎不可能。”

    這項發表在《科學報告》雜志上的研究重點研究德國小蠊這種在世界各地都能發現的蟑螂種類。

    研究小組利用6個月時間在印第安納州和伊利諾伊州的多單元建筑物中測試了不同種類的殺蟲劑及其組合。

    研究報告的作者指出,滅蟲者通常會混合不同類別的殺蟲劑,以確保能夠消滅對某一種殺蟲劑產生耐藥性的害蟲。

    研究人員從實驗室前的不同地點捕捉蟑螂,以評估每種情況下的最佳應對方案。

    沙夫說:“如果你有能力先測試蟑螂,然后挑選耐藥性弱的殺蟲劑,那就增加了消滅其的幾率。”

    “但是即便如此,我們也很難控制蟑螂的數量。”

    研究小組稱,其在研究期間能夠維持蟑螂數量的穩定,但無法令其數量大幅減少。

    其中一項單一殺蟲劑實驗表明,蟑螂起初對這種毒藥很敏感,在這種情況下,大多數蟑螂基本上都被消滅。但是,在另一項針對發展出耐藥性的蟑螂的試驗中,盡管使用了殺蟲劑,蟑螂數量還是增加了。

    然后,幸存下來的蟑螂會產生耐藥性更強的后代。

    沙夫說:“我們看到耐藥性在僅僅一代蟑螂的時間里增強了4到6倍。”

    “我們此前不知道會以如此快的速度發生這樣的事。”

    雌性蟑螂可以在其三個月的繁殖周期內產下多達50個后代。

    即便是很小一部分耐藥性比例和交叉耐藥性可能性也意味著蟑螂會不斷卷土重來。

    沙夫說:“其中一些方法的成本要高于僅使用殺蟲劑,但是如果這些殺蟲劑不能控制或消滅蟑螂,那就是在浪費錢。”

    他說:“多種方法相結合將是消滅蟑螂最有效的方法。”(編譯/張琳)

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