Contaminated manure & compost - weedkiller destroys tomatoes, potatoes, beans etc

Discussion in 'Compost, Fertilisers & Recycling' started by JWK, Jun 24, 2008.

  1. JWK

    JWK Gardener Staff Member

    Joined:
    Jun 3, 2008
    Messages:
    32,365
    Gender:
    Male
    Location:
    Surrey
    Ratings:
    +49,749
    This explains why my tomatoes have grown so distorted and are now useless.
    It has also stunted my potatoes and is the reason why my runner beans are a complete disaster this year :mad:

    I had hijacked princespansy's thread in early June about my tomatoes becoming distorted and stunted. http://www.gardenerscorner.co.uk/forum/showthread.php?t=14671

    This is one of the affected tomato plants:
    [​IMG]

    and a close up
    [​IMG]

    I thought I had better raise this as a new thread and appropriate name as it's turned into a nationwide problem. I'm not trying to cause panic, as this year anyone who is likely to suffer will already have lost their crops, we need to be prepared to ensure we don't suffer the same fate next year when getting compost.

    The problem is caused by a new weedkiller used by farmers on grassland, which is finding its way through cows and ending up in manure/compost. There are several reports of serious damage from allotment growers (try googling "aminopyralid problem"). It's not just us gardeners and allotment holders, I have heard of commercial potato crops being lost on a large scale this year. Apparently this happened on a small scale last year, and an emergency education campaign was aimed at livestock farmers, vegetable growers and spraying and spreading contractors, obviously this did not solve the problem. According to the chemical manufacturer it's up to farmers to ensure they don't use or sell treated crops for manuring sensitive crops. This just is not going to work as I have found out to my cost.

    It's been very very frustrating for me as I had purchased 'Organic' compost in bags that I have used in previous years with no problems. I have contacted my supplier who was completely unaware of the problem, so everyone needs to be very very wary when getting any manure or buying compost.

    The RHS has issued a statement as they were getting lots of enquiries every day:
    http://www.rhs.org.uk/news/Weedkiller-manure.asp snippet follows:
    "Farmyard manure contaminated with weedkiller residue is causing abnormal growth of vegetable crops throughout the country.

    It is believed that the manure has been inadvertently contaminated with aminopyralid. This selective, hormone-type herbicide is used on pastures to control weeds. Manure from animals fed on treated pastures contains chemical residues sufficient to damage susceptible crops.

    Gardeners buying this manure to apply to vegetable crops and gardens are coming across abnormal growth particularly on tomatoes, potatoes and legumes, although ornamental plants such as delphinium, phlox and roses may also be susceptible. ..."


    The Pesticides Safety Directorate (who are the 'responsible' Government Agency) have taken a casual approach. Their advice to gardeners is to make their own inquiries and pass the results to the manufacturers, Dow AgroScience!
    http://www.pesticides.gov.uk/garden.asp?id=2465

    There is an article in the Yorkshire Post, prompted by an allotment holder who is actively trying to raise the profile of this issue;
    Gardeners warned over manure poison
    http://www.yorkshirepost.co.uk/news/Gardeners-warned-over-manure-poison.4209491.jp
    snippet:
    "The authority says the weedkiller does break down and should not persist in the soil for more than a year. But it can last longer in a compost heap. Confirming its presence is "costly". And "if in doubt, it is probably best not to consume affected crops".

    Sorry for the long post, but I have collected a lot of material from other forums and websites and have tried as much as possible to condense it, but please be very aware that this problem is not just for people that buy loads of farmyard manure, it can find its way into bagged compost as well.
     
    • Informative Informative x 1
    • Flinty

      Flinty Gardener

      Joined:
      May 19, 2008
      Messages:
      737
      Ratings:
      +5
      John

      Oo-er. What a bummer - to try and go organic, only to find you've imported some persistent traces of hormone herbicide. So far, my stuff looks OK but thanks for the warning.
       
    • JWK

      JWK Gardener Staff Member

      Joined:
      Jun 3, 2008
      Messages:
      32,365
      Gender:
      Male
      Location:
      Surrey
      Ratings:
      +49,749
      Yes it's quite frustrating to lose so much, but I've managed to scrounge some more tomato plants and they are starting to catch up. I am planning to dig up the potatoes this wekend to see if anything has actually grown underneath, some people are reporting that there are few or very small tubers, my runner beans are still only about 1 ft tall :(
       
    • Ivory

      Ivory Gardener

      Joined:
      May 30, 2008
      Messages:
      1,339
      Ratings:
      +2
      Criminal, downright criminal.

      I have grown really inimical to herbicides of all kinds after the farmer who bordered on my old garden sprayed my ground with a universal herbicide (twice). Imagine waking up one morning, going out, and every single plant has gone orange and dead. The second time this happened the hedges were high and screened the rest of the garden a bit, but the first time I lost everything, grass, shrubs, creepers, roses.

      I am not saying that every farmer in the world is such an idiot, far from it, but the simple truth is that you cannot expect 100% of people to behave responsibly. You give them this kind of chemicals, there will always be an idiot using it in a stupid way.
      And, as is clear now, these chemicals often have long terms effects that the producers did not take into account. If that stuff finds its way into manure and compost do you really believe that milk and steaks from these cows are not affected? I am not saying that all agriculture should go organinc tomorrow, I am aware of the economical difficulties. But more information and more attention is desperately necessary.
       
    • Kristen

      Kristen Under gardener

      Joined:
      Jul 22, 2006
      Messages:
      17,534
      Gender:
      Male
      Location:
      Suffolk, UK
      Ratings:
      +12,669
      "these chemicals often have long terms effects that the producers did not take into account."

      FWIW the instructions for this herbicide, Forefront, are quite clear about this:

      "Manure and Slurry Management

      Do not use animal waste (e.g. manure or slurry) from animals fed on grass treated with Forefront, of fodder resulting from grass treated with Forefront, on susceptible crops e.g. peas, beans and other legumes, sugar beet, carrots and umbelliferae, potatoes and tomatoes, lettuce and other compositae, or land intended for growing such crops.

      If grass, hay, silage, manure or slurry is exported off your farm, it is your responsibility to inform the recipient of this information"
       
    • Ivory

      Ivory Gardener

      Joined:
      May 30, 2008
      Messages:
      1,339
      Ratings:
      +2
      It doesn't look like these instruction were much use.
      It's like selling guns with a label saying "warning, letal weapon". The producer has cleverly put himself above any legal responsibility, but I still think that selling such stuff in a system that is not prepared to consistently punish its misuse is criminally *dangerous*.
       
    • Kristen

      Kristen Under gardener

      Joined:
      Jul 22, 2006
      Messages:
      17,534
      Gender:
      Male
      Location:
      Suffolk, UK
      Ratings:
      +12,669
      "It doesn't look like these instruction were much use"

      Absolutely agree. My local farmer has a huge pile of manure on his pad for me (he had hoped to deliver 6 months ago, the pile is bigger now:thumb:) but luckily I'm armed with this knowledge and I can ask him whether this herbicide has been used; 6 months ago I would not have been so lucky. If it has I'm sunk, because I haven't budgeted for any other source of material:(
       
    • Kandy

      Kandy Will be glad to see the sun again soon.....

      Joined:
      Apr 23, 2006
      Messages:
      11,465
      Occupation:
      Head gardener
      Location:
      In the Middle Of Blighty
      Ratings:
      +6,543
      I follow Plotty's {Steve Partridge} updates in the Edible Gardening thread and the links have been put up on his website about this problem.I have also sent the links to all my allotment friends

      I have been using my own home made compost for a number of years as well as leaf mould that I make because I was unsure just what chemical residue might be in the manure from the local farmers.:(

      I am sorry that you are having problems with affected crops and know how you must be feeling.I would be gutted if it was me because I know what effort goes into sowing the seeds and nuturing the crops before we even get round to eating them
       
    • Ivory

      Ivory Gardener

      Joined:
      May 30, 2008
      Messages:
      1,339
      Ratings:
      +2
      I apologize for my first rather rash statement about producers (not they are always beyond blame in such problems, but sometimes, by mistake, they may be innocent,lol).

      Long time ago I came to the conclusion that when buying chemicals for gardening and agriculture you should provide a "chemically aware person" licence, which you should only get after a decent course and reasonably strict test. It would not solve all problems, after all people take driving licences and still make accidents. But it would improve things a bit (despite the evidence of accidents still happening I wd not like to live in a world where everyone can drive without ever taking a driving lesson in their life). Utopia, I know. But it would make sense :(
       
    • Kristen

      Kristen Under gardener

      Joined:
      Jul 22, 2006
      Messages:
      17,534
      Gender:
      Male
      Location:
      Suffolk, UK
      Ratings:
      +12,669
      No apology needed. Someone aint doing their job of passing the message from the manufacturer along the chain!

      "chemically aware person" - farmers have to have that, AFAIK. Certainly for a farm hand to use a crop sprayer s/he needs to be certificated, or is that certified?!
       
    • Ivory

      Ivory Gardener

      Joined:
      May 30, 2008
      Messages:
      1,339
      Ratings:
      +2
      Do they?! England is such a civilized country. In Italy we are Neanderthals.
       
    • JWK

      JWK Gardener Staff Member

      Joined:
      Jun 3, 2008
      Messages:
      32,365
      Gender:
      Male
      Location:
      Surrey
      Ratings:
      +49,749
      Yes there are lots of warnings on the product but this just doesn't work in practice. Last year, some professional potato growers lost crops after spreading manure that had been contaminated with this chemical. An emergency education campaign, aimed at livestock farmers, vegetable growers and spraying and spreading contractors was instigated. This was reported in the Farmers Weekly: http://www.fwi.co.uk/Articles/2007/11/30/108626/damage-to-potato-crops-caused-by-manure-or-slurry.html. However much we â??educateâ?? it looks like we are not going to solve this issue. I have heard of whole crops of potatoes being lost again this year from some of my farmer relatives.

      I think the main problem is that the whole supply chain is too complicated to regulate. Dow AgroSciences donâ??t actually sell Forefront directly, they use distributors, maybe then a farmer or spraying contractor will apply the product, maybe another subcontractor will come and make the hay/silage, perhaps another hay/silage merchant will collect and store the grass product. This grass product might be sold on the open market and transported by another contractor. Finally a vegetable grower gets it, how is he/she to know what is in the product? Iâ??m afraid this whole chain is too complex for the warnings to be passed on from on to another.

      The other real problem is the persistency of this chemical. Following spraying it can pass through a cowsâ?? digestive system, then end up in manure that has to be composted for at least a year maybe two before it has broken down.

      I have written to DEFRA, the Pesticides Agency (who are supposed to regulate these producst), Environ Health plus anyone else I can think of that might help get this banned until a practical set of safeguards can be introduced. I'm not holding my breath.
       
    • Kristen

      Kristen Under gardener

      Joined:
      Jul 22, 2006
      Messages:
      17,534
      Gender:
      Male
      Location:
      Suffolk, UK
      Ratings:
      +12,669
      Absolutely agree. I posted the details because I wanted to balance the argument that the manufacturer might not have tested the product carefully.

      Putting aside any Organic debate for a moment: reading the product details it sounds like a miracle product - it will kill docks and even clover in pasture, which I'm sure must be a neat trick for the farmer. It breaks down on contact with soil, but it binds to plant material, so until any plant material it has bound to has broken down the active ingredient is still there - which is why, I assume , it can travel through a cow and stay active in the manure.

      I don't know the answer because, as you say, farmers will sell, or contract, the hay from their pastures. For the unfortunate people effected someone is liable - there is an onus on the farmers and intermediaries to has passed the warning along the line, and someone obviously has not done that.

      Awareness will help (bit late though, of course) so that people buying manure can ask if Forefront etc. has been used.
       
    • JWK

      JWK Gardener Staff Member

      Joined:
      Jun 3, 2008
      Messages:
      32,365
      Gender:
      Male
      Location:
      Surrey
      Ratings:
      +49,749
      Yes I agree, but the answer to that question is complicated by the fact it's so persistant. The farmer may have unwittingly contaminated his grassland when he spread slurry or manure from another farm or fed his animals with hay or silage from elsewhere. The persistency of this chemical and lack of any cheap test makes it very difficult for the farmer to be 100% sure unless absolutely everything is produced on his own farm.
       
    • Kristen

      Kristen Under gardener

      Joined:
      Jul 22, 2006
      Messages:
      17,534
      Gender:
      Male
      Location:
      Suffolk, UK
      Ratings:
      +12,669
      I agree, but

      "The farmer may have unwittingly contaminated his grassland when he spread slurry or manure from another farm or fed his animals with hay or silage from elsewhere"

      that farmer should have been informed by the farmer he got it from - the instructions on Forefront say "If grass, hay, silage, manure or slurry is exported off your farm, it is your responsibility to inform the recipient of this information".

      Of course that hasn't happened, otherwise there wouldn't be a problem!, but I reckon it does create liability, and probably negligence - although that's no consolation to anyone effected.

      I'm not one for trying to sue the council because I was stupid enough to trip over a paving slab, but a public execution now and again puts others on their toes!

      FWIW I read somewhere that rotavating is the best way of getting rid of it. The active ingredient needs to come into contact with the soil (maybe some air too). When the chemical is bound to plant material (e.g. bits of grass/straw in the manure) it is still active, so a pile of manure is going to take a long time to become inactive. Mixing with soil, and mixing often [how often? sorry, the article didn't say, or I don't remember], will neutralise it.

      Hopefully your problem is restricted to just the pots you used it in, it must be soul destroying for anyone who spread manure over their whole plot.
       
    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