Kurucz N, Whelan P I, Carter J M, Jacups S P
Department of Health and Families, Medical Entomology, Centre for Disease Control, Darwin, Northern Territory, Australia.
J Vector Ecol. 2009 Dec;34(2):317-23. doi: 10.1111/j.1948-7134.2009.00040.x.
Adjacent to the northern suburbs of Darwin is a coastal wetland that contains important larval habitats for Aedes vigilax (Skuse), the northern salt marsh mosquito. This species is a vector for Ross River virus and Barmah Forest virus, as well as an appreciable human pest. In order to improve aerial larval control efforts, we sought to identify the most important vegetation categories and climatic/seasonal aspects associated with control operations in these wetlands. By using a generalized linear model to compare aerial control for each vegetation category, we found that Schoenoplectus/mangrove areas require the greatest amount of control for tide-only events (30.1%), and also extensive control for tide and rain events coinciding (18.2%). Our results further indicate that tide-affected reticulate vegetation indicated by the marsh grasses Sporobolus virginicus and Xerochloa imberbis require extensive control for Ae. vigilax larvae after rain-only events (44.7%), and tide and rain events coinciding (38.0%). The analyses of vector control efforts by month indicated that September to January, with a peak in November and December, required the most control. A companion paper identifies the vegetation categories most associated with Aedes vigilax larvae population densities in the coastal wetland. To maximize the efficiency of aerial salt marsh mosquito control operations in northern Australia, aerial control efforts should concentrate on the vegetation categories with high larval densities between September and January.
达尔文北郊附近是一片沿海湿地，这里是北方盐沼蚊——费氏伊蚊（斯库斯）重要的幼虫栖息地。该物种是罗斯河病毒和巴马森林病毒的传播媒介，也是一种相当严重的人类害虫。为了加强空中幼虫控制工作，我们试图确定与这些湿地控制作业相关的最重要的植被类别以及气候/季节因素。通过使用广义线性模型比较各类植被的空中控制情况，我们发现，对于仅受潮汐影响的情况，黑三棱/红树林区域需要进行的控制量最大（30.1%），对于潮汐和降雨同时出现的情况，也需要进行大量控制（18.2%）。我们的结果还表明，由盐沼草类弗吉尼亚鼠尾粟和旱生草指示的受潮汐影响的网状植被，在仅降雨事件（44.7%）以及潮汐和降雨同时出现的事件之后（38.0%），需要对费氏伊蚊幼虫进行大量控制。按月进行的病媒控制工作分析表明，9月至1月需要进行的控制最多，11月和12月达到峰值。一篇配套论文确定了与沿海湿地费氏伊蚊幼虫种群密度最相关的植被类别。为了最大限度提高澳大利亚北部空中盐沼蚊控制作业的效率，空中控制工作应集中在9月至1月间幼虫密度高的植被类别上。
