中文摘要：

本研究通过各种理化因子对新霉素活性的影响考察新霉素的稳定性，进一步通过田间小区试验方法考察新霉素对大白菜软腐病的田间实际防治效果．理化因子试验结果表明，新霉素具有良好的稳定性，能够耐酸碱，耐高温、耐紫外线的直射，具有生产、储藏和应用上的优势．田间小区试验结果表明，新霉素200mg／L、100mg／L、50mg／L的防治效果均优于常用药剂72％农用硫酸链霉素．新霉素200mg／L、100mg／L、50mg／L的防治效果为84．1％、72．83％、63．2％．72％农用硫酸链霉素50mg／L的防治效果为60．24％．两组试验显示了新霉素具有良好的应用前景，为把新霉素开发为一种新型的抗生素类农药奠定了基础．

英文摘要：

The stability of neomycin was tested by physical and chemical factors to study the antibacterial activity. Field trials of neomycin against Erwinia carotovora subsp, carotovora was conducted to study neomycin control effect. Physical and chemical factors test showed that neomycin is very stable, it could resist strong acid, alkali, high temperature and UV light, besides neomycin has many advantages in pro- ducing,storing,applying. The results of field trial show that neomycin has good control efficiency against Erwinia carotovora subsp, carotovorat. The control effects of neomycin with 200 mg/L,100 mg/ L,50 mg/L were 84.1%,72.83% and 63.2% respectively. The control effect of streptomycin with 200 mg/L was 60.24 %. The test results show that neomycin has a promising prospect in pesticide industry. All these advantages make it a very good candidate for pestcide.