含氟酮磺草胺与哒草特除草组合物对水稻田杂草的防除效果

Control Effect on Herbicidal Compound Containing Triafamone and Pyridate on Weed in Rice Field

[目的]研究含氟酮磺草胺和哒草特除草组合物对水稻杂草稗草的共毒系数、防除水稻田杂草效果、安全性等技术指标的影响。[方法]采用室内活性测定试验,定期调查田间药效。[结果]该除草组合物共毒系数均大于120,具有显著的增效作用,施药20 d后组合物对阔叶杂草的防效为86%～93%,禾本科杂草防效为85%～93%,总防效为86%～92%,优于单剂防效,且施药40 d后组合物的各项防效下降幅度较小,优于单剂,持效期长,且对水稻以及后茬作物安全。[结论]该组合物与单剂相比,有效地扩大杂草防除谱和提高防效。

[Objective]To compare effect of different doses of herbicidal composition consist of triafamone and pyridate with single agent on rice weed co-toxicity coefficient,the effect of rice field weed control,safety and other specifications.[Method]The field efficacy test was conducted by means of laboratory activity test and periodic investigation.[Result]The co-toxicity coefficient of the herbicidal composition exceeded 120,the synergism was obvious,the results of spraying 20 days after the test showed that broadleaf weed control effect of the herbicidal composition reached the ratio of 86%-93%meantime the gramineous weed control ratio attained 85%-93%and the total control effect achieved 86%-92%.Compared with single agent,the herbicidal composition had a better weed control effect.After spraying 40 days,the results of field efficacy test showed slight decrease,but it was far better than single agent,and longer duration of efficacy.The herbicidal composition was safe for rice as well as for subsequent crops.[Conclusion]Compared with single agent,this composition has broader herbicidal spectrum and better control efficacy.