50%辛硫磷乳油对毛豆的安全性试验

Safety Test of 50% Phoxim EC on Young Soybean Plants

经连续２ 次安全性试验，认为辛硫磷对毛豆的药害程度可用叶面症状、心叶展开的受阻程度、药害后植株恢复正常生长的能力来综合评判，并据此提出药害分级方法。沉淀及不呈均相的药液更易造成药害。豆类作物上慎用辛硫磷。

After two safety tests,it was recommended that the degree of injury to young soybean plants caused by phoxim can be comprehensively estimated by symptoms on leaf surface,obstruction of inner leaf growth,and the ability of growth recovery after injury. Based on this recommendation,the methods of grading injury were developed. Precipitate in the insecticide solution and uneven emulsion were major causes of injury. Application of phoxim on soybean crops must be done with caution,and the insecticide can be applied by watering the roots to control insect pests in the soil.