几种土壤处理除草剂室内生物活性及对甘薯的安全性测定

The Bioactivity and Safety to Sweet potato of Several Soil Treatment Herbicides

[方法]采用室内盆栽法和土壤处理法测定8种药剂的活性及对甘薯的安全性。[结果]供试的8种药剂对反枝苋及稗草均具有较高除草活性;异丙甲草胺、二甲戊灵、氟乐灵、乙草胺、仲丁灵、异草松6种药剂的选择性系数分别为6.15、5.78、3.04、2.57、2.29、2.19,安全性好;草酮和扑草净选择性系数为0.70、1.24,安全性差。[结论]异丙甲草胺、二甲戊灵、氟乐灵、乙草胺、仲丁灵及异草松可以开展田间试验,进一步确定在甘薯田应用的可行性,扑草净和草酮不宜在甘薯田应用。

[Methods] The activity and the safety of 8 herbicides to sweet potato were studied in laboratory in order to investigate the feasibility of application in sweet potato field with soil treatment.[Results] All 8 herbicides showed high herbicidal activity to redroot amaranth and barnyardgrass.The selectivity coefficient of metolachlor,pendimethalin,trifluralin,acetochlor,butralin and clomazone were 6.15,5.78,3.04,2.57,2.29 and 2.19,respectively,and they were safe to sweet potato.Selectivity coefficient of oxadiazon and prometryn were 0.70 and 1.24 respectively,and they were unsafe to sweet potato.[Conclusions] metolachlor,pendimethalin,trifluralin,acetochlor,butralin and clomazone can be carried out in field experiment further to be determine the feasibility of application in sweet potato fields.Prometryn and oxadiazon were not suitable to use in sweet potato fields.