噁草酮和丙炔噁草酮对5种稻田杂草室内活性的比较

Bioactivity of Oxadiazon and Oxadiargyl to 5 Weeds of Rice Paddy

摘要: 采用土壤浇灌法和茎叶喷雾法在室内测定了噁草酮和丙炔噁草酮对稗草、千金子、鸭舌草、鳢肠和碎米莎草的生物活性。结果表明，用土壤浇灌法，噁草酮对千金子、鸭舌草、碎米莎草、稗草和鳢肠IC₉₀分别为13.98、23.43、35.48、247.58 和 561.78 g a.i./hm²；丙炔噁草酮对鸭舌草、碎米莎草、千金子、稗草和鳢肠IC₉₀分别为15.53、24.42、28.08、54.38 和 98.35 g a.i./hm²。用茎叶喷雾法，噁草酮对碎米莎草、鸭舌草、千金子、稗草和鳢肠IC₉₀分别53.01，111.57，187.11，342.75 and 425.34 g a.i./hm²；丙炔噁草酮对碎米莎草、千金子、鸭舌草、稗草和鳢肠IC₉₀分别为14.87，22.21，22.63，86.23 and 300.63 g a.i./hm²。测定结果表明丙炔噁草酮对供试5种稻田杂草的活性均明显高于噁草酮。

Abstract: The bioactivity of oxadiazon and oxadiargyl was compared on Echinochloa rusgalli, Leptochloa chinensis, Monochoria vaginalis, Eclipta prostrate, Cyperus iria in glasshouse using the respectively soil drench method at the pre-emergent and foliar spray method at 2 - 3 leaf stage. Results showed that the oxadiargyl gave the better control to 5 weeds of rice paddy than oxadiazon using the soil drench method at the pre-emergent and foliar spay method at 2 - 3 leaf stage. Using the soil drench method, the bioactivity of oxadiazon to 5 weeds was L. chinensis > M. vaginalis > C. iria > E. rusgalli > E. prostrate from high to low arrangement with IC₉₀s of 13.98, 23.43, 35.48, 247.58 and 561.78 g a.i./hm²; but the bioactivity of oxadiargyl to 5 weeds was M. vaginalis > C. iria > L. chinensis > E. rusgalli > E. prostrate from high to low arrangement with IC₉₀s of 15.53, 24.42, 28.08, 54.38 and 98.35 g a.i./hm². Using the foliar spay method at 2 - 3 leaf stage, the bioactivity of oxadiazon to 5 weeds was C. iria > M. vaginalis > L. chinensis > E. rusgalli > E. prostrate from high to low arrangement with IC₉₀s of 53.01, 111.57, 187.11, 342.75 and 425.34 g a.i./hm²; but the bioactivity of oxadiargyl to 5 weeds was C. iria > L. chinensis > M. vaginalis > E. rusgalli > E. prostrate from high to low arrangement with IC₉₀s of 14.87, 22.21, 22.63, 86.23 and 300.63 g a.i./hm².