I'm trying to attract the whitefly away from my cauliflowers. The yellow cards seem to be helping a little but I think I should have done something sooner. Unfortunately other insects get stuck to the cards too.
Listening to 'Gardeners' Question Time' I heard Neem Oil recommended so I'm thinking of trying that next time. A fellow allotmenteer uses washing up liquid - another possibility. As for now, hopefully, a cold snap is not far away and should solve the problem.
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