Although very poisonous, the leaves of rhubarb can be used as a very effective spray against aphids on brassicas and flowers. Soak the leaves in water for a week, then filter off the solution - dispose of what's left of the leaves onto the compost heap. Dilute the solution with water, about 75 water to 25 solution, add a couple of squirts of washing-up liquid, put in watering can, and sprinkle plants as necessary. Further waterings and rain will ensure that cabbages etc are perfectly clean and edible at harvest time.
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Although very poisonous, the leaves of rhubarb can be used as a very effective spray against aphids on brassicas and flowers. Soak the leaves in water for a week, then filter off the solution - dispose of what's left of the leaves onto the compost heap. Dilute the solution with water, about 75 water to 25 solution, add a couple of squirts of washing-up liquid, put in watering can, and sprinkle plants as necessary. Further waterings and rain will ensure that cabbages etc are perfectly clean and edible at harvest time.