阿耳发特对印鼠客蚤毒杀效果观察

Studies on the Toxicity of ALPHA-AMITHRIN to Xenopsylla cheopis

目的 :观察阿耳发特对印鼠客蚤的实验室毒效。方法 :瓶膜法。结果 :(1)当药物浓度在 12 .5mg/l以上时 ,KT50 在 10分钟以内 :12 .5mg/l为 8.78min ;2 5mg/l为 7.95min ;5 0mg/l为 5 .6 5min ;10 0mg/l为 4 .6 3min。 (2 )当药物浓度为 10 0mg/l时 ,2 4h死亡率为 96 .70 % ;(3)半数致死浓度LC50 为 18.6 9mg/l(17.14～ 2 0 .38)。 (4) 10 0mg/l浓度药膜在室温和普通湿度下存放 15 0天后 ,仍可使 95 %以上的试蚤死亡。结论 :阿耳发特 3%乳油毒力较强 ,气味小 ,对人畜较为安全 ,残效时间较长 ,可在控制家鼠鼠疫灭蚤中使用。

Objective: To studies the control efficac y of 3% ALPHA-AMITHRIN against Xenopsylla cheopis. Methods: residual smearing method was used. Results :(1)When the concentrations of ALPHA-A MITHRIN while 12.5, 25, 50, 100 mg/l, the KT 50 values were 8.78, 7.95, 5.65, 4.63 min; (2)the 96.70 %～ mortality(24 hour) with the ALPHA-AMITHRIN concentration of 100 mg/l; (3)the LC5o is 18.69 mg/l (17.14～20.38); (4)when the insecticide was applied at 100 mg/l ALPHA-AMITHRIN using residual smearing, at room temperature and natural humidit y, its efficacy could last for more than 150 days; Conclusion: The ALPHA-AMITHRIN can be used in flea control in plague epidemic area.