四种吡啶类除草剂防除白喉乌头的筛选试验

Screening Experiment of Four Pyridine Herbicides on the Aconitum leucostomum

于2009年5～7月在新疆新源县那拉提阿吾赞草原选用61.6%三氯吡氧乙酸EC、75%二氯吡啶酸SG、20%氯氟吡氧乙酸异辛酯EC、24%氯氨吡啶酸4种除草剂对草原毒草——白喉乌头进行了防除筛选试验。结果表明24%氯氨吡啶酸EC 300 mL/hm2的株防效、鲜重防效显著,且对禾本科牧草安全,同时亩成本低;而20%氯氟吡氧乙酸异辛酯EC 1500 mL?hm2虽然株防效、鲜重防效也显著,且对禾本科牧草安全,但毒草——白喉乌头的根不腐烂,同时亩成本较高。因此,建议生产上使用24%氯氨吡啶酸EC 300 mL/hm2。

In may to July 2009, triclopyr 61.6% EC, clopyralid 75% SG, fluroxypyr-meptyl 20% EC and aminopyralid 24% EC had been scrermed for controlling poisonous weeds-Aconitum leucostomum in Awuzan grassland, Nalati, Xinyuan county, Xinjiang. The results showed that aminopyralid 24% EC 300 mL/hm^2 and fluroxypyr-meptyl 20% EC 1500 mL/hm^2 had remarkable controlling effect for the individual plant and fresh weight. They are safety for forage grasses; but the cost of aminopyralid 24% EC was lower than that of fluroxypyr-meptyl EC on a unit of area, and fluroxypyr-mepty120% EC not decomposed the root ofAconitum leucostomum （poisonous weeds）. Therefore, we suggest using aminopyralid 24% EC 300 mL/hm^2 in production.