A friend told me that when they watched the 'lottie' programme on UK Gold this week, they said to soak rhubarb leaves in water and leave for a few days then spray on your brassica's to kill white fly.
Do you think this would kill black fly too?
Let's give it a try and see what happens. I've never heard of that before, but if it works, why not?
I have heard that too, but as ours has only been planted this year won't be touching it until next!
Will await the outcome with interest.
It definitely works; almost anything will kill aphids, but the oxalic acid from rhubarb leaves is pretty effective for most insects.
Might give it a go on the broad beans - black fly all over
No need to soak your rhubarb leaves.Just boil them up for a short while and then strain,cool and spray.
Not selective though and will deter most insects I believe.
That should clean your pans too, or so I have been told! :)