Shelf life of Weedol weedkiller

Discussion in 'General Gardening Discussion' started by richard6298, Aug 11, 2014.

  1. richard6298

    richard6298 Gardener

    Joined:
    Jan 27, 2012
    Messages:
    30
    Gender:
    Male
    Location:
    West Yorkshire
    Ratings:
    +6
    Hi. Does anyone know the shelf life of Weedol weedkiller? Thanks.
     
  2. Kristen

    Kristen Under gardener

    Joined:
    Jul 22, 2006
    Messages:
    17,534
    Gender:
    Male
    Location:
    Suffolk, UK
    Ratings:
    +12,667
    I would have thought it was fairly indefinite, if not in direct sunlight and protected from extremes of temperature.
     
    • Agree Agree x 2
    • PeterS

      PeterS Total Gardener

      Joined:
      Mar 18, 2005
      Messages:
      6,662
      Gender:
      Male
      Occupation:
      Retired
      Location:
      N Yorks
      Ratings:
      +4,013
      I would agree with Kristen. The active ingredient is Glyphosate (N-(phosphonomethyl)glycine), which is a pretty simple chemical - inspite of its complicated name.
       
    • clueless1

      clueless1 member... yep, that's what I am:)

      Joined:
      Jan 8, 2008
      Messages:
      17,778
      Gender:
      Male
      Location:
      Here
      Ratings:
      +19,594
      My experience is that Roundup weakens with age. The active ingredient is glyphosate, but perhaps it is not that that decays, but the surfactants that stick it down? Or, as glyphosate is reduced to harmless starches by soil microbes, if those soil microbes were airborne (as many soil microbes are), and they got into the container, could they not break down the glyphosate?
       
      • Informative Informative x 1
        Last edited: Aug 17, 2014
      Loading...

      Share This Page

      1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
        By continuing to use this site, you are consenting to our use of cookies.
        Dismiss Notice