Pembrokeshire,
United Kingdom 
I have clouds of white fly in my greenhouse.
Can anyone suggest some nematodes to get rid of them and where can I get them
23 Mar, 2013
Answers
you will have to wait for it to warm up to use the wasp. they dont like the cold. I've used the sticky yellow fly traps in the past with some good results.
23 Mar, 2013
I'd be following Sbg's advice at this time of year...
23 Mar, 2013
There is a natural predator, a parasitic wasp called Encarsia formosa. You should be able to get them online. Fumigation is the other method.
23 Mar, 2013