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Greenhouse infestation


I need help.  I am proud new greenhouse owner and have a problems with tiny (1mm) black beetles infesting my salad crops and seedlings. I don't know what they are, they look similar to some beetles we had last year on a flowering cherry tree.  They have not attacked the tomatoes, cucumber, peppers of chilli plant.  They suck the leaves and leave tiny holes.  Any ideas how I can get rid of them please?



  • ZeroZero1ZeroZero1 Posts: 577
    You can get fumigation cones for greenhouses. They are like small slow burning fireworks. Light and leave, close the door
  • FairygirlFairygirl Posts: 54,029
    Can you take a photo? It's important to know what you have before offering advice. They could simply be blackfly which can be washed off, but they might be pollen beetles or something else entirely different   :)
    It's a place where beautiful isn't enough of a word....

    I live in west central Scotland - not where that photo is...
  • Thank you both for quick replies.  Fairygirl , I will take a photo first thing tomorrow and share it.

    ZeroZero1 - I thought you could only use the fumigator cones when the greenhouse is empty of plants.

  • Morning Fairygirl.  I tried to take a photo but they don't really show up against the soil and I have disposed of the seedlings.,  Having done a bit more research, I think they are probably flea beetles.  The seedlings all had small round holes in the leaves and the pictures on Google look like them. Can I use pyrethrum on them?

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