居美20%微胶囊剂对蜚蠊杀灭及滞留效果的观察

目的了解居美20％微胶囊剂（Empire20）灭蠊实际应用效果,探讨毒死蜱类药剂的应用前景。方法选择蜚蠊密度较高的饭店（A1）、餐馆（A2）和糕点制售点（A3）各1个,将20％微胶囊剂分别稀释100、50倍,在施药前、后,采用粘捕法分别测定试验区及对照区（A1选择洗碗间,A2、A3均选择售卖间）的蜚蠊密度,并作持效观察。结果在A1、A2试验区施用居美20％微胶囊剂,杀灭及滞留效果均较差,施药30d后较施药前相对密度分别仅下降12．7％和5．6％,效果不显著;在A3试验区施用,滞留期可达10d左右,基本达到实际使用要求。结论滞留性药剂使用时,应根据实际环境状况,避免药剂被无效冲刷,使药剂在环境中能得到较好的保留,以取得更好的药效。

Killing and Long-lasting Efficacy of Empire 20 for Cockroach

Objective To study the effect of Empire 20 in field for cookroach control and to evolute the applied prospect of chlorphrifos in China. Methods Three kinds of field,one restaurant(A1),one eatery(A2) and one bakery(A3) and two concentration Empire 20 (100 fold and 50 fold dilurtions) were selected, the cockroach densities of experiment and control were tested before and after spraying with sticktrap adhesive method, and the longlasting efficacies were observed. Results The longlasting efficacy was poor effect for cockroach at A1 and A2 experimental area. The longlasting period was about ten days for A3, and met the need for field control. Conclusion The efficacy of killing and longlasting efficacy of Empire 20 for cockroach will be better if the longlasting insecticides is reserved at the environment.