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作者	单位
李美，李岩，高兴祥，房锋，李健，吴加军，李茂昇	（1.山东省农业科学院植物保护研究所/山东省植物病毒学重点实验室,山东济南 250100 2.济宁市兖州区农业局,山东兖州 272100 3.陶氏益农农业科技(中国)有限公司,上海 201203）

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中文摘要:

为明确氟氯吡啶酯与啶磺草胺复配对小麦田杂草的毒力及其对小麦的安全性，采用温室盆栽生物测定法对二者的毒性进行了测定，用Gowing法对其联合作用进行了评价；采用剂量-曲线法，评价了200 g·L^-1 啶磺草胺·氟氯吡啶酯WG的除草活性、对小麦的安全性、对小麦和杂草的选择性。结果表明，氟氯吡啶酯与啶磺草胺对供试的雀麦、大穗看麦娘、播娘蒿、猪殃殃等4种杂草均为加成作用，综合二者的防效结果，建议以啶磺草胺6~24 g·hm^-2与氟氯吡啶酯4~8 g·hm^-2（0.75∶1~6∶1）复配为宜。二者3∶1的复配制剂200 g·L^-1 啶磺草胺·氟氯吡啶酯WG对雀麦、大穗看麦娘、播娘蒿、猪殃殃的GR₉₀ 分别为3.02、1.39、1.24、1.94 g·hm^-2。对3个小麦品种济麦22、中育6号、科农199鲜重抑制的GR₁₀分别为6.25、11.64、3.96 g·hm^-2。在小麦和大穗看麦娘、猪殃殃、播娘蒿之间的选择性指数均较好，选择性指数在2.04~9.39之间；该药在小麦和雀麦之间的选择性指数略低，在1.31~3.85之间。

英文摘要:

Halauxifen-methyl is a novel arylpicolinate herbicide with an auxinic mode of action.Pyroxsulam is an acetolactate synthase(ALS) inhibiting herbicide.Both of them were new registered herbicide in China. Pot experiments were carried out to determine the combined toxicity of pyroxsulam and halauxifen-methyl to weeds,and their safety to winter wheat in glasshouse in Jinan,Shandong province. The results showed that pyroxsulam and halauxifen-methyl exhibited an additional effect on the control of Bromus japonicus,Alopecurus myosuroides,Galium maborasense,and Descuminia sophia. 6-24 g·hm^-2 of pyroxsulam added 4-8 g·hm^-2 of halauxifen-methyl exhibited high control effect to all the tested weeds. The GR₉₀ of Bromus japonicus,Alopecurus myosuroides,Galium maborasense,and Descuminia sophia were 3.02,1.39,1.24,and 1.94 g·hm^-2,respectively under the treatment of 200 g·L^-1 pyroxsulam and halauxifen-methyl WG with a ratio of 3∶1. The GR₁₀ of Jimai 22,Zhongyu 6,and Kenong 199 were 6.25,11.64 and 3.96 g·hm^-2 according to reduction of fresh weight of wheat plant. The selective index were 1.31-9.39 between wheat and weeds.

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