Weed control effects and cyhalofop-butyl mixture crop safety of penoxsulam and in direct seeding paddy fields | 五氟磺草胺和氰氟草酯复配剂对水稻直播田杂草的防除效果及安全性评价
2011
Zhang Hongjun, Ministry of Agriculture, Beijing(China),Institute for the Control of Agrochemicals | Cui Hailan, Chinese Academy of Agricultural Sciences, Beijing(China), Institute of Plant Protection | Zhu Wenda, Hubei Academy of Agricultural Sciences, Wuhan(China),Institute of Plant Protection and Soil Science
chinois. 摘 要：采用田间试验方法研究了五氟磺草胺和氰氟草酯复配剂（五氟磺草胺・氰氟草酯）对水稻直播田杂草的控制效果和应用安全性。结果表明，五氟磺草胺・氰氟草酯对直播稻田的禾本科杂草、阔叶杂草和莎草均具有较好的防除效果，有效成分用量90～180g／hm. 的综合防效可达95％以上，显著优于对照药剂氰氟草酯，与五氟磺草胺、五氟磺草胺＋氰氟草酯、丙草胺＋苄嘧磺隆的防效相当。五氟磺草胺・氰氟草酯显著降低了稗、鸭舌草种群对田间N、P、K养分的吸收，保持了土壤肥力。五氟磺草胺・氰氟草酯有效成分用量90～120g／hm. 苗后茎叶处理对水稻安全，对后茬小麦、油莱、甘篮、葱、大蒜等作物无不良影响。
Afficher plus [+] Moins [-]anglais. To provide guidance for chemical weed management in direct seeding paddy fields, experiments were conducted to evaluate the weed control effects and crop safety of penoxsulam and cyhalofop-butyl mixture （Top- Shot）. The results showed that penoxsulam and cyhalofopbutyl mixture had good control effects on grass weeds, broad-leaf weeds and sedge weeds in direct seeding paddy fields. The overall effect was over 95% at 90--180 g a. i./hm. , significantly higher than cyhalofop-butyh and equivalent to that of penoxsulam, penoxsulam＋cyhalofopbutyl, and pretilachlor＋bensulfuron- methyl. The application of penoxsulam and cyhalofopbutyl mixture significantly reduced the absorption of N, P, and K in Echinochloa crus-galli and Monochoria vaginalis populations and therefore conserved the soil fertility. Penoxsulam and cyhalofopbutyl mixture had good safety to paddy rice after post-emergence application at 90-120 g a. i./hm. and resulted in no damages to succeeding crops such as wheat, rape, cabbage, green onion and garlic.
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