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试验结果表明，２０％增效哒螨灵所试的四种浓度（１５００～３０００倍液）对棉红蜘蛛防治效果达９６％以上，持效期为２０～２５天。
The results showed that the 20% synergistic pyridaben tested four concentrations (1500 ~ 3000 times) on cotton spider mite control effect of more than 96%, duration of 20 to 25 days.