Yellow sticky fly traps
As a new owner of a greenhouse I became aware that white fly can be a major curse in the G/H. Yellow sticky fly traps were advised, went to various cheap places; ended up having to get them from B&Q at £4.98 for 5! If the greenhouse gets quite hot you have to change them quite frequently; it starts to get expensive. Online, I found American recipes for making your own involving stuff we can't get here (Tanglewood) Another recipe suggested coating yellow card with petroleum jelly (Vaseline). Has anyone had any success with this?