Green Fly and Black Fly on Tomatoes & other edibles

Does anyone have a safe way to keep green fly and black fly off edible plants? The sprays they sell that are suitable for edible crops don't seem to work at all. I don't really like using chemicals either. I have tried spraying diluted washing up liquid but it damaged the plant :/

Comments

  • Farway
    Farway Posts: 13,001
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    Safest way I find is just squish the beggars with your fingers, 100% MSE, organic free range solution
    Eight out of ten owners who expressed a preference said their cats preferred other peoples gardens
  • Davesnave
    Davesnave Posts: 34,741
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    Grow something alongside that they like better, like nasturtiums, or maybe confuse them with strong smelling plants like onions nearby. I plant marigolds with my toms. Not 100% effective, but whitefly avoid them and, to be honest, I don't find greenfly like toms anyway. Peppers, yes, they'll have them, but a soap solution or just blasting them with water usually does enough.
    Maybe your soap solution was too strong. It doesn't need more than a drop or two.
  • Silvertabby
    Silvertabby Posts: 8,895
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    Davesnave said:
    Grow something alongside that they like better, like nasturtiums, or maybe confuse them with strong smelling plants like onions nearby. I plant marigolds with my toms. Not 100% effective, but whitefly avoid them and, to be honest, I don't find greenfly like toms anyway. Peppers, yes, they'll have them, but a soap solution or just blasting them with water usually does enough.
    Maybe your soap solution was too strong. It doesn't need more than a drop or two.
    As Dave says.  I grow my toms and chillies in a greenhouse, along with a couple of pots of marigolds.  Not 100%, but near enough not to need sprays. 

  • sallyTt
    sallyTt Posts: 14
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    Thanks! I have been squashing them, blackflies have decimated most of my nasturtiums, they just keep coming. Apparently you can eat their leaves but i havent tried them

  • MovingForwards
    MovingForwards Posts: 16,817
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    I've sprayed own brand washing up liquid / water on my roses for the last few days, only a few bugs left on them now.
    Mortgage started 2020, aiming to clear it in 2026.
  • Farway
    Farway Posts: 13,001
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    sallyTt said:
    Thanks! I have been squashing them, blackflies have decimated most of my nasturtiums, they just keep coming. Apparently you can eat their leaves but i havent tried them

    Sometimes nasturtiums are used as sacrificial plants.
    As you found blackfly love them, as do cabbage white butterflies
    I find my nasturtiums are quite robust until the bitter end in Autumn when just lacy stumps and fat pupating caterpillars are left

    Eight out of ten owners who expressed a preference said their cats preferred other peoples gardens
  • youngie
    youngie Posts: 999
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    if using a washing up liquid spray do not use anti-bacterial liquid as it will kill the plants

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