"What they are doing just doesn't make sense."
Little added that Bristol Council's use of vinegar instead of glyphosate is wrong, as is a retail ban: "Vinegar is toxic to bees. Is that where we think we are going? Taking an acid and spraying it on our plants? Is that where we want to be?
"In retail, it is one of the safest and most environmentally friendly products ever been allowed out there. Whatever would replace it would be worse."
Soil Association policy director Peter Melchett said: "We need to reduce areas where weed control is necessary and encourage wildflowers and natural habitat, then where you do need to control plant growth in urban areas, steam or foam systems are very effective and some areas you will need to hand weed."
He claimed those methods could be cost effective: "If you have a reasonable area to cover a steam/foam system is quite cheap to run after capital costs."
He added the Soil Association was against councils using vinegar as a weed killer: "Vinegar is used in organic systems but I'm not sure it is suitable for large-scale use in urban areas compared to steam or foam."
A Greenpeace survey found German retailers are dropping glyphosate but in the UK only Waitrose has dropped glyphosate-based Roundup.