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Toxic Courgette Plant!

Hi there ... I wonder if you can help.   

I grew 4 courgette plants from seeds (using a reputable supplier of seeds: Thompson & Morgan) and we have had great results from 3 of the plants.   But the fourth, which looks identical in health and condition to the others has been a serious problem!  The courgette fruits which look perfectly OK to eat, once cooked resulted in meals spoilt for all members of the family as well as friends of the family ...with relatives and friends suffering from food poisoning and complaints of vomiting, stomach cramps and diarrheoa, etc.  We subsequently tested each the courgettes from each of the 4 plants and we found one plant where the courgettes were bitter/metallic and extremely unpleasant to taste.  The courgette plant has since been dug out and disposed of.   We also understand that for some people, food poisoning suffered proved fatal!  This problem with some courgette plants (which can also affect cucumbers and melons) is to our complete surprise, not an uncommon one - but to myself (a gardener with some 50 years experience) and to my elderly parents it is the first time we have heard of it and we were wondering whether this problem should have greater publicity.

I'm led to believe that the cause of the toxicity (for what are normally toxin free plants) is that on rare occasions, the courgette plant can back mutate and it then regains a natural ability to produce toxic levels of cucurbitacins.   

Other than testing (tasting) each courgette plant for toxicity once the courgettes have been cut from the plant ... is there any other way we can prevent courgette plants from developing this condition in the first place?

Your help in this matter to spread the message on this problem and for making the wider community check their courgettes before cooking them would be most appreciated.  

Best Regards

Philip John Windsor

Posts

  • Pete.8Pete.8 Posts: 11,340
    I came across this article a few days ago which surprised me.
    Not T&M but Mr.Forthergills
    https://www.mr-fothergills.co.uk/Product-Recall-MRF/#.Xw2KaCj0laQ


    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • BenCottoBenCotto Posts: 4,718
    Rutland, England
  • GemmaJFGemmaJF Posts: 2,286
    Welcome to the forum Philip, I only heard about this issue this year on this very forum, with a forum member posting of their experience.

    For sure the message should be spread widely. I would never in a million years have thought veg plants grown from seed from major manufacturers could produce a toxic fruit.

    We have five courgette plants this year, all checked and given the OK, fortunately.

  • Blue OnionBlue Onion Posts: 2,995
    Thanks for the PSA.. I've never heard of that!  I had some bitter cucumbers one year.. and figured it was down to underwatering.  I ended up tasting every one prior to putting them on a salad.. I didn't consider they would be toxic.  🤢
    Utah, USA.
  • EricsGardenEricsGarden Posts: 151
    It appears that there have been problems reported with Unwins seeds too in the last day or so.
  • mdelvinsmdelvins Posts: 1
    Hi there ... I wonder if you can help.   

    I grew 4 courgette plants from seeds (using a reputable supplier of seeds: Thompson & Morgan) and we have had great results from 3 of the plants.   But the fourth, which looks identical in health and condition to the others has been a serious problem!  The courgette fruits which look perfectly OK to eat, once cooked resulted in meals spoilt for all members of the family as well as friends of the family ...with relatives and friends suffering from food poisoning and complaints of vomiting, stomach cramps and diarrheoa, etc.  We subsequently tested each the courgettes from each of the 4 plants and we found one plant where the courgettes were bitter/metallic and extremely unpleasant to taste.  The courgette plant has since been dug out and disposed of.   We also understand that for some people, food poisoning suffered proved fatal!  This problem with some courgette plants (which can also affect cucumbers and melons) is to our complete surprise, not an uncommon one - but to myself (a gardener with some 50 years experience) and to my elderly parents it is the first time we have heard of it and we were wondering whether this problem should have greater publicity.

    I'm led to believe that the cause of the toxicity (for what are normally toxin free plants) is that on rare occasions, the courgette plant can back mutate and it then regains a natural ability to produce toxic levels of cucurbitacins.   

    Other than testing (tasting) each courgette plant for toxicity once the courgettes have been cut from the plant ... is there any other way we can prevent courgette plants from developing this condition in the first place?

    Your help in this matter to spread the message on this problem and for making the wider community check their courgettes before cooking them would be most appreciated.  

    Best Regards

    Philip John Windsor
    I read an article about this a couple of weeks ago, first time I'd heard of it. I usually use seed harvested from last years crop. I have 8 courgette plants and having read about this decided to do a taste test. My first courgette of the season was foul., a bit like eating a sloe! I spat it out and tasted another from a different plant, and that was fine. I threw the offending courgette away and the following courgette from the offending plant was tasted by my husband (I wanted to make sure I wasn't imagining this) He also spat it out. I have since composted that plant and have tested a courgette from each plant since. They are all fine. So glad I happened to read a facebook post before I cooked it, saved me from a lot of trouble.
    Perhaps this problem is more widespread this year and maybe the public should be made aware?
    Happy growing 
    Faye
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