Dynamic of pursuit(imazethapyr )degradation on soya

The residue of pursuiton soya and the degrada-tion patqttern of pursuit in soil have been studied.The half-life ofpursuit is found to be 8-9d.When the interval period from pursuitspraying to soya harvesting is 95-117d,the final residues of pur-suit from seed and haulm of sova and soit were not detected,Theconclusion is that purquit is safe to soya when sprayed properly.