After exposure to weedicide samples for 24h alone , four herbicides ( nc - 302d ( + ) , frifluralin , sofit and 2 - ethyl - 4chloro sodium hydration ) can all give rise to the frequencies of mcn and ona ( p < 0 . 05 , or p < 0 . 01 ) 精禾草克、氟乐灵、扫?特， 2 -甲- 4氯钠水剂4种除草剂单独作用24h所诱发的泥鳅红细胞微核细胞率间存在显著差异。
