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Courgette powdery mildew...again

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  • Courgette powdery mildew...again

    One of my courgette plants seems to be showing signs of powdery mildew. I have grown them for the last couple of years and have got used to this, but previously it has started a bit later in the season. This year I was also a bit later getting them started - sown 9th May. The plant in question (black beauty) is only just starting to produce first courgette whereas we have already had a few off the other unaffected plant (F1 defender).

    My understanding was that it was lack of water, which made sense, particularly as last year they were grown in pots. This summer of never ending rain they are in the ground prepared with plenty of compost and surely cannot be going thirsty?

  • #2
    PMW I was going to write a reply but instead here's a very good vine link about powdery mildew :-

    http://www.growfruitandveg.co.uk/gra...ins_20334.html

    hope this helps.
    Location....East Midlands.

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    • #3
      Nice find Bren will have a read of that this evening myself
      He who smiles in the face of adversity,has already decided who to blame

      Artificial intelligence is no match for natural stupidity

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      • #4
        My plants are woefully small - not enough leaf growth to harbour anything.
        A simple dude trying to grow veg. http://haywayne.blogspot.com/

        BLOG UPDATED! http://haywayne.blogspot.com/2012/01...ar-demand.html 30/01/2012

        Practise makes us a little better, it doesn't make us perfect.


        What would Vedder do?

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        • #5
          I used a milk spray and it's worked really well so far.

          Using Milk to Control Powdery Mildew | Garden Guides

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          • #6
            A lot of these fungal conditions reproduce more rapidly in acidic conditions so if you apply any slightly alkaline spray such as bicarbonate of soda that should at least slow it down.

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            • #7
              I have a couple of plants that have huge foliage, but don't seem to be producing many flowers. No sign of powdery mildew yet, touch wood.
              Granny on the Game in Sheffield

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              • #8
                Thanks, there does seem to be a bit of conflicting advice BBC - Dig In Blog: How to deal with mildew on courgette plants says its fine to compost affected leaves, which I did last year. I added some of this compost just before planting them out so perhaps the BBC advice is wrong?

                Anyway, I'll give the milk spray a try and see how it goes. I also found this site which is useful RNZIH - Horticulture Pages - Control of powdery mildew and it confirms that powdery mildew doesn't like wet weather so I guess I should at least be grateful for that!

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                • #9
                  All advice I have read recommends you burn infected foliage as the spores can over winter and then you will be hit again.

                  Podosphaera Fusca would be the prime suspect with gourds but there are other powdery mildew forming fungi that like warm damp conditions.

                  Colin
                  Last edited by Potstubsdustbins; 13-07-2012, 02:09 PM.
                  Potty by name Potty by nature.

                  By appointment of VeggieChicken Member of the Nutters club.


                  We hang petty thieves and appoint great ones to public office.

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