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Under Glass [a good sulphur fumigant is your best bet, although I don't use them myself... just grow more tagetes, :-\]
Quote from: saddad on January 10, 2009, 22:19:26Under Glass [a good sulphur fumigant is your best bet, although I don't use them myself... just grow more tagetes, :-\]i grew marrigolds in my greenhouse last year and still got whitefly.want to put a sulpher candle in mine but will it kill my 2 grape vines[/quotetry planting Tagates just outside of the greenhouse door, overflowing onto your path. Then, as you enter or leave the greenhouse, you'll brush the Tagates with your feet, releasing the pungent oils!! this helps to deter the whitefly from even entering the greenhouse. Also plant some beneath where your side wall vents are. ;)