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Leicestershire, United Kingdom Gb

what proportions of derrs liquid to water do I use on my runner beans which are covered in black fly



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

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