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Gardening

Find tips and tricks to make your garden or allotment flourish on our Gardening forum.

How to get rid of indoor blackfly?

4 replies

Abcd3 · 21/06/2019 22:38

An indoor spider plant has several little black flies (presumably blackfly) on and around it. How do I get rid of them, ideally without a spray that would be toxic to breathe? Thanks!!

OP posts:
bumblingbovine49 · 22/06/2019 10:48

These sound like gnats. I think they tend to lay eggs on the soil around the plant and wet/damp soil can encourage it, then they hatch and fly around. I got rid of the ones on my indoor plants by putting some small pebbles over the soil so that the soil was completely covered. This stopped the eggs hatching. I also stuck one of these yellow trap on a stick into the soil get rid of the ones flying around

This seemed to work

Abcd3 · 22/06/2019 12:42

Thank you! I’ll try those.

OP posts:
MereDintofPandiculation · 23/06/2019 10:38

They lay eggs in the soil which hatch into transparent white larvae which eat fleshy roots. If you have a lot of the flies, I would suggest taking the plant out of the pot, shaking off enough soil to make sure you don't have any grubs left, then repotting into fresh soil, then covering the soil with a thick layer of gravel or horticultural grit. They're attracted by moist humus-rich soil.

"Blackfly" is the term given to species of aphids that are black, rather than the usual greenfly. You find them in a thick black mass along the new tender tips of branches - often on broad beans. You don't often find them indoors, thank goodness!

ElizabethinherGermanGarden · 23/06/2019 10:54

I had this from a chilli plant given to me by a friend. I eventually threw the plant away but still have a few of the buggers in the house (no other pot plants). I don't know where they have been hiding and it's driving me mad.

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