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Activity of Selective Postemergence Grass Herbicides in Soil

Published online by Cambridge University Press:  12 June 2017

James J. Kells ,
William F. Meggitt  and
Donald Penner
James J. Kells
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., East Lansing, MI 48824
William F. Meggitt
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., East Lansing, MI 48824
Donald Penner
Affiliation:
Dep. Crop and Soil Sci., Pestic. Res. Ctr., Michigan State Univ., East Lansing, MI 48824
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Abstract

Several herbicides were toxic to barnyardgrass [Echinochloa crus-galli (L.) Beauv. # ECHCG] when applied as a soil treatment at 0.56 kg ai/ha to a sandy loam soil with 0.8% organic matter. At this application rate, haloxyfop {methyl ester of 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, CGA-82725 {2-propynyl ester of 2-[4-[(3,5-dichloro-2-pyridinyl)oxy] phenoxy] propanoate}, and DPX-Y6202 {ethyl ester of 2-[4-[(6-chloro-2-quinoxalinyl)oxy]-phenoxy] propanoate} provided the greatest persistence of activity. At 31, 28, and 25 days after treatment with these herbicides, respectively, barnyardgrass growth was still inhibited by 50%. Soil activity and persistence of fluazifop {butyl ester of (±)-2-[4-[[5-trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} increased following soil sterilization. Covering the soil surface with vermiculite prior to treatment intercepted the spray and significantly reduced control of 4- to 6-cm-tall barnyardgrass plants with fluazifop.

Keywords

DiclofopfluazifophaloxyfopsethoxydimEchinochloa crus-galliCGA-82725DPXY6202RO-13-8895ECHCG
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 62 - 65
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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