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为明确除草剂17.5%草除.精喹禾灵乳油在移栽油菜田的应用前景,研究了对油菜田杂草的控制作用及该药剂对田间光照强度和油菜产量的影响。结果表明:17.5%草除.精喹禾灵乳油对油菜田杂草具有较好的防除效果,药后第20天的总体防效为98.82%-99.94%,随时间的延长药效略有下降,120 d内的控草效果仍可达92%以上;17.5%草除.精喹乳油对田间主要杂草看麦娘Alopecurus aequalis、牛繁缕Malachium aquaticum及菵草Beckmannia syzigachne的防除效果都较好,用药后40 d对3种杂草的防效都在96%以上,120 d以内防效仍可以达到86%以上;使用17.5%草除.精喹乳油能显著提高油菜田间的透光率,随着用药量的增加,透光率逐渐上升;17.5%草除.精喹乳油的施用对油菜株高、千粒重没有显著影响,但对油菜第1分枝高度、单株分枝数和每分枝角果数影响较大,能显著提高油菜产量。
In order to clarify the application of 17.5% grass herbicide, the application of quizalofop-p-ethyl in transplanted rape fields was studied, and the control effect on weeds in rapeseed field and its effect on light intensity and rapeseed yield were studied. The results showed that: 17.5% of grass except Jingrui Wo Ling EC weed rape field has a good control effect, the first 20 days after the drug control effect was 98.82% -99.94%, with a slight decrease in efficacy over time , The control effect of grass was still above 92% in 120 days and 17.5% of grass except Jinguo EC was better than Alopecurus aequalis, Malachium aquaticum and Beckmannia syzigachne , The control effect on three kinds of weeds was over 96% after 40 days of treatment, the anti-effect still reached over 86% within 120 days, and 17.5% of the grass was used, Jingjing EC significantly improved the light transmittance of the rape field, With the increase of the dosage, the light transmittance increased gradually; 17.5% of the grass was removed.The application of the refined quinoline had no significant effect on the plant height and 1000-grain weight of rapeseed, but the first branch height, Larger number of branches, can significantly improve the yield of rapeseed.