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１９９９ 年５ 月桃蚜（ Ｍｙｚｕｓ ｐｅｒｓｉｃａｅ Ｓｕｌｚｅｒ） 危害期，用１０００ 倍、１５００ 倍、２０００ 倍４８ ％ 的乐斯本（ 毒死蜱） 稀释液进行防治试验，用２０００ 倍４ ．５ ％ 氯氰菊酯作对照。结果表明，不同稀释倍数的乐斯本对桃蚜的防效均达８０ ％ 以上。
In May 1999, Myzus persicae Sulzer was harmed with 1000 times, 1500 times and 2000 times 48% of chlorpyrifos diluted with 2000 times. 5% cypermethrin as a control. The results showed that different dilution multiples of Myzus persicae control efficiency reached more than 80%.