Author Topic: Red lines inside leeks  (Read 3528 times)


  • Acre
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  • Posts: 402
Red lines inside leeks
« on: May 18, 2024, 14:23:18 »
I picked the last of my leeks today and when stripping the outer skins noticed red lines running down the length of the stem. I have seen it before but can't find out what it is doing it. Can anyone help or advise me please.


  • Hectare
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  • Posts: 603
Re: Red lines inside leeks
« Reply #1 on: May 18, 2024, 21:13:23 »
Alium leaf miner. Where the grubs eat the leek, a red stain appears. If you see little black grains, that's the pupating grubs. If you search on here, you'll find various posts from about 5 years ago. It seems to be less of a problem now, perhaps because the advice is to put barrier netting on the crops.


  • Hectare
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  • Posts: 17,900
  • Derby, Derbyshire (Strange, but true!)
Re: Red lines inside leeks
« Reply #2 on: May 20, 2024, 15:13:50 »
I think the number of people using barrier netting is reducing the pest pool... only found one grub in 48 plants last season.


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