Ansari M A, Sharma V P, Mittal P K, Razdan R K
Malaria Research Centre, Delhi, India.
Indian J Malariol. 1995 Jun;32(2):76-84.
Laboratory evaluation revealed that the Spherimos and Vectolex formulations of Bacillus sphaericus produced 97 and 100% larval mortality respectively in Culex quinquefasciatus at a dose as low as 0.008 ml/sq m as against 93 and 97% mortality respectively at 1 ml/sq m in Anopheles stephensi. However, in An. culicifacies similar level of mortality was not observed even at 10 ml/sq m of these formulations. Field evaluation revealed 100% reduction of Cx. quinquefasciatus larvae for 2-3 weeks in pools and wells with single application of Spherimos @ 2 ml/sq m as against 95.4% reduction @ 10 ml/sq m in irrigation channel for one week. Vectolex @ 10 ml/sq m provided 99-100% reduction of Cx. quinquefasciatus larvae up to 9 weeks in wells and 1 week in channels.
实验室评估显示，球形芽孢杆菌的Spherimos和Vectolex制剂在剂量低至0.008毫升/平方米时，对致倦库蚊的幼虫死亡率分别为97%和100%，而在相同剂量下，对斯氏按蚊的幼虫死亡率分别为93%和97%。然而，对于库氏按蚊，即使使用10毫升/平方米的这些制剂，也未观察到类似的死亡率。现场评估显示，在水池和水井中单次施用2毫升/平方米的Spherimos，致倦库蚊幼虫数量在2至3周内减少了100%，而在灌溉渠道中施用10毫升/平方米时，一周内幼虫数量减少了95.4%。在水井中施用10毫升/平方米的Vectolex，可使致倦库蚊幼虫数量在9周内减少99%至100%，在渠道中则可在1周内减少99%至100%。
