18_2_4_滴微乳剂防治非耕地薇甘菊田间药效试验

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1、南方农业学报JOURNALOFSOUTHERNAGRICULTURE2014，45（3）：406-409ISSN2095-1191；CODENNNXAAB南方农业学报http：//www.nfnyxb.cn45卷DOI：10.3969/j：issn.2095-1191.2014.3.40618%2,4-滴微乳剂防治非耕地薇甘菊田间药效试验*黄永禄，刘晓亮，唐文伟，曾东强（广西大学农药与环境毒理研究所，南宁530005）摘要：【目的】明确18%2,4-滴微乳剂对非耕地薇甘菊的防治效果，为其推广应用提供科学依据。【方法】设18%2,4-滴微乳剂540.0、324.0、202.5和162.0ga.

2、i./ha4个处理，与常用化学除草剂41%草甘膦异丙胺盐水剂推荐剂量1845.0ga.i./ha及空白对照处理进行比较，在薇甘菊生长旺期施药，并于药前和药后15、30d调查薇甘菊覆盖度，药后45d调查薇甘菊覆盖度和鲜重，计算薇甘菊覆盖度防效及鲜重防效，2009、2010年两年重复试验。【结果】18%2,4-滴微乳剂在供试剂量下对薇甘菊有良好的防除效果，其中162.0~202.5ga.i./ha剂量处理后45d对薇甘菊覆盖度防效达97.74%~100.00%，鲜重防效达98.80%~100.00%，显著高于对照药剂处理的防效。【结论】18%2,4-滴微乳剂可有效防除非耕地薇甘菊，推荐使用剂量为

3、162.0~202.5ga.i./ha。关键词：薇甘菊；2,4－滴；微乳剂；防治效果中图分类号：S451.2文献标志码：A文章编号：2095-1191（2014）03-0406-04Fieldtrialsof18%2,4-Dmicro-emulsionagainstMikaniamicranthainnon-cultivatedland*HUANGYong-lu，LIUXiao-liang，TANGWen-wei，ZENGDong-qiang（InstituteofPesticide&EnvironmentalToxicology，GuangxiUniversity，Nanning53000

4、5，China）Abstract：【Objective】Thecontroleffectof18%2，4-Dmicro-emulsion（ME）againstMikaniamicranthainnon-cultivatedlandwasdeterminedtoprovidereferencesforitsapplicationandpromotion.【Method】Fourdifferenttreatmentsof18%2,4-DME（540.0，324.0，202.5and162.0ga.i./ha）weresprayedonMikaniamicranthaleavesatpeakgro

5、wthstagetocomparetheircontroleffectswithrecommendedlevelsofcommonchemicalherbicide（glyphosateisopropylaminesaltaqueoussolution1845.0ga.i./ha）andthecontrol.ThecoverageofMikaniamicranthabeforeandafterspraying15and30days，andthecover-ageandfreshweightofMikaniamicranthaafterspraying45daysweremeasuredtoc

6、alculatethecontrolefficiency.Theexperi-mentwasrepeatedfortwoyears（2009and2010）.【Result】Allthedosagesof18%2,4-DMEintheexperimentsshowedgreatcontroleffectsonMikaniamicrantha.Thecontroleffectsof162.0-202.5ga.i./haof18%2,4-DMEoncoverageandfreshweightofM.micranthainnon-cultivatedlandwere97.74%-100.00%an

7、d98.80%-100.00%on45thday，whichweresignifi-cantlyhigherthanthatofthecontrolherbicide.【Conclusion】Duetogoodcontroleffect，162.0-202.5ga.i./haof18%2,4-DMEcouldberecommendedtocontrolMikaniamicranthainnon-cultiva