School of Public Health, Tropical Medicine and Rehabilitation Sciences, James Cook University, Cairns, Queensland, 4870 Australia.
Am J Trop Med Hyg. 2010 Jun;82(6):1053-9. doi: 10.4269/ajtmh.2010.09-0603.
We examined the use of megadoses of VectoBac WG for residual control of Aedes aegypti in 2-L plastic buckets. Doses of 10x, 20x, and 50x the recommended rate of 8 mg/L provided >/= 90% control for 8, 8, and 23 weeks, respectively. There was no significant difference in mortality between dry (neat) or aqueous mixture of VectoBac WG. Pretreatment of dry containers up to 8 weeks before flooding did not significantly decrease efficacy through 11 success weeks. Thus, megadoses of dry formulations of Bti can be used for residual control of Ae. aegypti in small containers. Furthermore, these doses use small amounts of product (0.08-0.4 g/L) that is more practical to measure than the minute amounts (0.008 g/L) required by the recommended rate, and cost US$2.18 to treat 50 Cairns yards containing an average total of 80 containers. This method could also be used to control Aedes albopictus.
我们研究了使用大剂量的 VectoBac WG 对 2 升塑料桶中的埃及伊蚊进行残留控制。推荐剂量 8 毫克/升的 10 倍、20 倍和 50 倍剂量分别提供了> = 90%的 8 周、8 周和 23 周的控制效果。VectoBac WG 的干(纯)或水混合物之间死亡率没有显著差异。在淹没前长达 8 周预处理干燥容器不会通过 11 个成功周显著降低功效。因此,大剂量的干 Bti 制剂可用于小容器中埃及伊蚊的残留控制。此外,这些剂量使用的产品量很小(0.08-0.4 克/升),比推荐剂量所需的极少量(0.008 克/升)更易于测量,并且每处理 50 个凯恩斯院子(每个院子平均有 80 个容器)的成本为 2.18 美元。这种方法也可用于控制白纹伊蚊。