Protecting cabbages

Paul Cassidy asked 13 years ago

I was told that a great way to protect cabbages was to place rhubarb leaves in water and bring to the boil. Once boiled, allow for the water to cool down and then add a small amount of washing up liquid. You then spray your cabbages with the water and the washing up liquid allows it to stick to the leaves thus offering protection. Is this correct please ?

1 Answers

Gerry Daly Staff answered 4 years ago
Boiled rhubarb leaves are sometimes used as a greenfly killer … it contains oxalic acid which is a poison, which is why the leaves are not eaten. Some added liquid soap helps to make it stick and is insecticidal in itself.