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期 刊 ：植物保护学报 2012年

关键词：野燕麦；精噁唑禾草灵；炔草酯；生物测定；敏感性；

Keywords:wild oat, fenoxaprop-P-ethyl, clodinafop-propargyl, bioassay, sensitivity,

摘 要 ：为明确不同野燕麦种群对精噁唑禾草灵和炔草酯的敏感性水平,采用整株生物测定与种子生物测定分别检测了河南、湖北、江苏三省共11个野燕麦种群对精噁唑禾草灵和炔草酯的敏感性。结果表明,2种测定方法获得的野燕麦种群对2种除草剂的敏感性基本一致。整株生物测定结果显示,不同野燕麦种群对精噁唑禾草灵和炔草酸的敏感性存在显著差异,其中,金水闸野燕麦种群对精噁唑禾草灵和炔草酯敏感性最高,其GR₅₀值(有效成分)分别为2.46、3.65 g/hm²,而辉县野燕麦种群对精噁唑禾草灵和炔草酯敏感性最低,GR₅₀值(有效成分)分别为15.00、23.12 g/hm²,其余野燕麦种群对精噁唑禾草灵和炔草酯的敏感性介于金水闸种群与辉县种群之间。种子生物测定结果与整株生物测定结果趋势一致,但表现出的敏感性略高。

Abstract:To investigate the differences in sensitivity of wild oat populations to fenoxaprop-P-ethyl and clodinafop-propargyl, 11 wild oat populations were collected from Henan, Hubei, Jiangsu provinces, and whole plant and seed bioassay were employed. The result of whole plant bioassay revealed that the sensitivities of the 11 populations to fenoxaprop-P-ethyl and clodinafop-propargyl were significantly different. Jinshuizha (JSZ) population was most sensitive to both herbicides, with GR₅₀ values (ai) of 2.46 and 3.65 g/hm², whereas Huixian (HX) population demonstrated lowest sensitivity to the herbicides, the GR₅₀ valued (ai) of 15.00 and 23.12 g/hm², the sensitivity of the other populations just laid in between JSZ and HX. Seed bioassay showed same tendency, while with more sensitivity.

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