目的 :观察不同剂型和浓度的奋斗呐对地面游离蚤的杀灭效果。方法 :选择不同类型的农村居民进行地面滞留喷洒。结果 :0 .0 3 %和 0 .0 5%奋斗呐悬浮剂的灭蚤率分别为 86.2 5%和 90 .2 1% ,校正灭蚤率分别为 86.54%和90 .41%。 0 .0 6%奋斗呐可湿性粉剂 + 1%DDVP混合液的灭蚤率为 96.99%。不同剂型和浓度的奋斗呐 ,其灭蚤率均无显著性差异。结论 :奋斗呐对游离的印鼠客蚤、猫栉首蚤指名亚种和人蚤均有良好的灭效 ,适宜浓度为 0 .0 3 %～ 0 .0 5% ,不宜盲目混配。但经常进行灭蚤的地区应重视杀虫剂的交替使用 Objective: To observe the killing effect of different dosage forms and concentrations of fights na on fleas on the ground. Methods: Choose different types of rural residents for surface detention spraying. Results: The killing fleas of 0.3% and 0.5% Fenosu Suspension were 86.2 5% and 90.21%, respectively, and the corrected flea killing rates were 86.54% and 90.41% respectively. 0 .0 6% struggling na WP + 1% DDVP mixture flea kill rate was 96.99%. Different formulations and concentrations of struggle Na, the flea-killing rate was no significant difference. CONCLUSIONS: Struggling na has good effect on the free fleas of S. japonicum and P. capitatus, and the suitable concentration is 0. 03% -0.0 5%. It is not advisable to mix them blindly. However, frequent use of insecticides should be emphasized in areas where fleas are frequently eliminated