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    New method for the devitalization of imported horsetail (Equisetum hyemale)

    Blanchon, Dan

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    Devitalisation.pdf (509.2Kb)
    Date
    2012
    Citation:
    Blanchon, D. J., Ennis, I. L., Lewthwaite, J. R., Large, M. F., and Bussell, W. T. (2012). New method for the devitalization of imported horsetail (Equisetum hyemale). New Zealand Journal of Crop and Horticultural Science. 40 : 21-30.
    Permanent link to Research Bank record:
    https://hdl.handle.net/10652/2281
    Abstract
    Despite being rated as one of the world’s worst weeds, Equisetum hyemale was until recently imported into New Zealand for use by the floristry industry, subject to devitalization. It was subsequently found that imported stems were not being successfully devitalized and importation was banned. This study, in two trials, used different dilutions of six herbicides, including Roundup, the one listed in the MAF Biosecurity NZ standard, to investigate if it were possible to render stems non-propagable without destroying their commercial use. This research found that a Sharpshooter (oryzalin) formulation at 1 and 1:2 dilutions of the field application strength was the only herbicide that completely devitalized the stem material with minimal impact on stem quality. Roundupat the concentration required by MAF Biosecurity NZ destroyed the stems, while 1:5 and 1:10 dilutions reduced the ability of the stems to be propagated, but still caused stem damage. AGPRO activated amitrole, Duplosan, Agritone and Kamba were not successful as devitalization agents.
    Keywords:
    horsetail, Equisetum arvense, Equisetum hyemale, biosecurity, devitalization, glyphosate, RoundupTransorb, Agritone 720, Duplosan, Kamba 500, AGPRO activated amitrole, Sharpshooter, MCPA, mecoprop, dicamba, oryzalin
    ANZSRC Field of Research:
    070603 Horticultural Crop Protection (Pests, Diseases and Weeds)
    Copyright Holder:
    c 2011 The Royal Society of New Zealand
    Rights:
    This digital work is protected by copyright. It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
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