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山东省小麦赤霉病菌对多菌灵的敏感性测定

Agrochemicals(2013)

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Abstract
[目的]测定山东省小麦赤霉病菌(Fusarium graminearum)对多菌灵的敏感性水平,为生产中合理用药提供参考。[方法]以2.0 mg/L多菌灵为鉴别剂量,在PDA平板上测定90个菌株的敏感性。用菌落直径法测定菌株的EC50值并计算抗性倍数;用孢子萌发法测定10 mg/L多菌灵对芽管伸长的抑制情况。[结果]90个小麦赤霉菌株的EC50平均值为(0.5269±0.0093)mg/L,没有抗性菌株存在;10 mg/L多菌灵对芽管伸长有明显抑制作用并导致芽管畸形。[结论]山东省小麦赤霉病菌均为多菌灵的敏感菌株,多菌灵可用于防治小麦赤霉病。
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Key words
fungicide resistance,carbendazim,Fusarium graminearum
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