Why ? well , Arsenic is part of this inorganic herbicide molecule. Even though it is tightly bound in the compound and basically "nullified" once in the soil AND carries only a caution label it is thought by some environmentalist that this arsenical should be banned because of it. There is no soil residual (except in pure sands) and on a toxicity list ranks well down the list from caffine , nicotine and asperin. Actually , I see us here in the USA going the way of some provinces in Canada and banning ALL pesticides for environmental reasons. No one here can see the justification of this draconian measure outside of pleasing the extreme of the environmentalist ....a key political group in some circles !
