Leicestershire,
United Kingdom 
what proportions of derrs liquid to water do I use on my runner beans which are covered in black fly
27 Jul, 2010
Previous question
Leicestershire,
United Kingdom
what proportions of derrs liquid to water do I use on my runner beans which are covered in black fly
27 Jul, 2010
Previous question
Derris dust & liquid is now off the market as the active ingredient rotenone is considered too poisonous and is extremely toxic to fish if it gets into the water system.
Silly question but if you still want to use it, does it not say on the container?
27 Jul, 2010