pests

[Maidenheadtaff]

i'm full of questions today probaly beause i should be studying for my acca exams and not gardening
There seem to be lots of black flies round my plants in the greenhouse and also the leaves on the toms and peppers are getting eaten.i planted welsh onion with some of the carots which apparently keeps the pests away, but is there anything else i can do to stop my veg been eaten alive and the little flies

[Maidenheadtaff]

[Tee Gee]

Sounds like Sciarid fly or Fungus fly as it is sometimes known.

There is a little on them here; http://tinyurl.com/2383qz