By Diamond
County Down,
United Kingdom 
Hi all..Was reading something interesting about Rhubarb leaves being used as an insecticide after being boiled in water..anyone tried this ?? Think i may give it a go :0)
13 Mar, 2012
Answers
Yes it will work but, as Sarraceniac says, keep well away from children and animals.
13 Mar, 2012
Do the leaves have to be boiled, or just steeped in water? I thought it was the latter...
13 Mar, 2012
I believe that the leaves have to be boiled. In this day and age I don't think that I would bother, besides oxalic acid could be nasty as it was used as a bleaching agent for whitening wood.
13 Mar, 2012
Think i will hang fire on that experiment then for now.. I have an ideal place to try it(if need be) at the bottom of my garden where the dogs etc are to be fenced off from as there are some plants with major thorns up there and i didnt want to dig them up until i know what they are.. thanks all for your comments on this :0)
13 Mar, 2012
Presumably it extracts the oxalic acid which becomes the active ingredient. Just make sure that the extract is kept safe from children and pets.
13 Mar, 2012