| 摘要: |
| 采用除草剂混配增效测定法，以异丙隆、扑草净及甲磺隆不同配比混配后在婆婆纳、蜡烛草上进行了药效测定和最佳配比的研究，并在此基础上进行了田间药效试验。结果表明：扑草净与甲磺隆混配具有增效作用，增效系数为1.39,1.14，最佳配比为144∶1；当异丙隆与扑草净+甲磺隆(75∶1)混配后，混配比<4.5∶1时，具有增效或相加作用，增效系数为1～1.18≥1，三者最佳配比为85∶75∶1。二种混配剂适宜用药量分别为402～548和549～622 g/hm2，在杂草2～3叶期使用，对杂草鲜重防效分别达83.1%～92.5%,84.5%～91.6%，药剂成本分别为16.8～23.4，35.6～40.2 元/hm2，对小麦及后茬作物安全。 |
| 关键词: 除草剂 异丙隆 扑草净 甲磺隆 混配 最佳配比 |
| DOI： |
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| 基金项目:杨凌科研基金项目(96J-18) |
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| Research on optimal mixing proportion of wheat field herbicides isoproturon and prometyne and methsulfuron-methy |
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| Abstract: |
| In this research,applying the herbicide mixing-synergy determination method,the control effect and the optimum mixing proportion of several herbicide mixtures which were made by mixing two or three of Prometyne and Methsulfuron-methy and Isoproturon according to different proportions,have been tested on Veronica-didyma Tenore or Phleum paniculatum in wheat field.The results showed:when Prometyne and Methsulfuron-methy were mixed,it had synergy,the synergy coefficient was respectively 1.39 and 1.14,the optimum mixing proportion was 144∶1.When the isoproturon and the mixtures (75∶1) of prometyne and Methsulfuron methy were mixed as <4.5∶1,it had synergy or addition,the synergy coefficient was 1-1.18≥1,the optimum mixing proportion was 85∶75∶1.The recommend effective-dosages of two mixed herbicides during wheat field weeds 2-3 leaves period was respectively 402-548 and 549-622 g/hm2,the average weight control effect was respectively 83.1%-92.5% and 84.5%-91.6%,the medicine cost was respectively 16.8-23.4 and 35.6-40.2 yuan/hm2.In addition,two mixed medicines were provided safe to wheat and following stubble crops. |
| Key words: herbicide isoproturon prometyne methsulfuron-methy mixing optimum proportion |
