进行了氮硝基脲类农药对水稻稻瘟病菌、水稻细条病菌室内抑制作用的初步研究。结果表明 :氮硝基脲的间氯代衍生物对水稻细条病菌有明显的抑制作用 ,其最佳抑制浓度为 2 .0 0× 1 0 - 4g/ml,抑制效果在 4 8h内为 1 0 0 % ,72h内为 75.85% ,但此类农药对水稻稻瘟病菌没有抑制作用。 A preliminary study on the inhibitory effect of nitrogen and nitro-urea-based pesticides on Magnaporthe grisea and Magnaporthe grisea in rice was conducted. The results showed that the m - chloro derivative of nitrosourea had a significant inhibitory effect on S. bacteriophylla and its optimum inhibitory concentration was 2.0 × 10 4 - g / ml, and its inhibitory effect was 10 0%, 75.85% within 72h, but this kind of pesticide has no inhibitory effect on rice blast fungus.