甲黄隆分别与苄嘧磺隆、醚黄隆和吡嘧磺隆混用对水稻安全性的研究

Security of Metsulfuron-methyl Mixed With Bensulfuron-methy， Cinosulfuron and Pyazosulfuron-ethyl Respectively on Rice Seeding

室内测定了甲黄隆单用以及分别与苄嘧磺隆、醚黄隆和吡嘧磺隆混用后对一叶一心期水稻的 IC50值和IC10值。试验结果表明：单用时对一叶一心期水稻的安全性顺序为： 苄嘧磺隆>吡嘧磺隆>醚黄隆>甲黄隆。苄嘧磺隆与甲黄隆混用液能提高对一叶一心期水稻 的安全性，吡嘧磺隆与甲黄隆混用时，吡嘧磺隆在部分浓度范围内，混用液对一叶一心期 水稻的安全性下降；醚黄隆与甲黄隆混用液对一叶一心期水稻的安全性均有降低。

The IC50 and IC10 of metsulfuron-methyl and its mixture with bensul furon-methyl, cinosulfuron, pyrazosulfuron-ethyl respectively to rice seedling of single-leaf were evaluated. Results showed that the security sequence i s bensulfuron-methyl＞pyrazosulfuron-ethyl＞cinosulfuron＞metsulfuron-methyl when used alone. Bensulfuron-methyl increased the security when mixed with mets ulfuron-methyl, but pyrazosulfuron-ethyl, when mixed with metsulfuron-met hy l decreased the security in some consistency. Cinosulfuron decreased the securit y more severely when mixed with metsulfuron-methyl.