Allotments 4 All

I have just read that if you grow a tobacco plant in the greenhouse it will "trap the little s*ds! in its leaves, is this true and if so where do Iget a couple of them.

Whitefly have never taken an interest in my tobacco plants. Is it possible you were reading about Bemisia tabaci (a notifiable pest but not often a problem in the UK) rather than Trialeurodes vaporariorum?
There are details of both here.
http://www.fera.defra.gov.uk/plants/publications/plantHealth/documents/bemisia.pdf

I read it here .
http://www.allotment.org.uk/vegetable/garden-hints/garden-hints-tips-henry-7.php

It starts of says something about hover fly then says "Plant the Tobacco plant (Nicotiana Sylvestris) and its sticky leaves will trap white fly by the hundreds. "

So I may have it wrong.

Any variety of tobacco will trap greenfly & blackfly by the thousand when the plants are maturing & the leaves become sticky which doesn't happen until fairly late in the growing season but I have never seen any whitefly on them.

Oh well, back to sticking up yellow strips..  :(