2种除草剂对胡麻田禾本科杂草的防除及其在胡麻籽中的残留测定

为明确108 g/L高效氟吡甲禾灵EC和10%精喹禾灵EC在胡麻田的安全施药剂量以及在胡麻籽中的最终残留量,采用田间茎叶喷雾处理法、气相色谱质谱联用法和高效液相色谱串联质谱法,开展了2种除草剂对杂草的防效和残留测定试验。结果表明:2种除草剂在施药剂量分别为145.8、90 g/hm~2时,对胡麻田禾本科杂草具良好防效,株防效分别达到94.34%、93.34%,鲜重防效分别达到95.26%、94.85%;对胡麻安全性高且增产效果明显,胡麻增产率分别达到92.50%、91.48%;在胡麻籽中的除草剂残留量符合国家食用植物油中最大残留限量标准,残留量分别为0.10、0 mg/kg。

Control Effects of Two Herbicides on Gramineae Weeds in Flax Field and Herbicide Residue Determination in Linseed

The study aims to investigate the best spraying dosage in flax field and the residual amount in linseed of 108 g/L haloxyfop-R-methyl EC and 10％ quizalofop-p-ethyl EC.An experiment was conducted to clarify the control effects of two herbicides on Gramineae weeds in flax field and determine herbicides' residue in linseed by stem and leaf treatment,GC-MS and HPLC-MS/MS.The results showed that the two herbicides were safe and had good control effect on Gramineae weeds in flax field,and could increase the flax yield significantly.Their plant control effects were 94.34％ and 93.34％,the fresh weight control effects were 95.26％ and 94.85％,and the yield-increase rates of the flax were 92.50％ and 91.48％ when effective dosage of the two herbicides were 145.8 g/hm2 and 90 g/hm2,respectively.Residual contents of herbicides were in accordance with the maximum residue limits of edible vegetable oil,the residue amount of the two herbicides were 0.10 mg/kg and 0 mg/kg in linseed respectively.