关键词: 大功达, 印鼠客蚤, 毒效, 现场灭效

Abstract: Objective To studies the efficacy of 8% Dagongda against Xenopsylla cheopis.Methods Using residual smearing method and laboratory,resort spraying method in field.Results(1)At concentration of 0.002 5%,the KT₅₀ is 4 min :0.002 5% is 3.77(3.40-4.15)min ;0.005% is 3.17( 2.88- 3.48)min;0.01% is 3.45(3.25-3.65)min ;(2)the LC₅₀ is 0.000 530 9%(0.000 490 0%-0.000 575 2%);(3)the 100% mortality(24 hour) with the Dagongda concentration is at the rate of 0.002 5% ;(4)when used as residual smearing,Dagongda can be keep its efficacy more than 270 days under room temperature;(5)The field tests,the killing rates of 0.03% Dagongda to Xenopsylla cheopis were 80.80% for 2 days and 93.87% for 29 days respectively.Conclusion The Dagongda can be used in flea control in plague epidemic area.