Ohba Shin-ya, Huynh T T Trang, Kawada Hitoshi, Le Loan Luu, Ngoc Huu Tran, Hoang San Le, Higa Yukiko, Takagi Masahiro
Department of Vector Ecology & Environment, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Nagasaki 852-8523, Japan.
J Vector Ecol. 2011 Jun;36(1):170-4. doi: 10.1111/j.1948-7134.2011.00154.x.
Residents of Vietnam living in areas with water shortages and/or poor tap water maintain water storage containers, such as jars, in and around their domiciles in order to store water used in daily life. Although these water jars are known to be important breeding sources of the Aedes mosquito, use of chemical larvicides in such containers is legally prohibited in Vietnam. In this study, we identified the dominant mosquito insect predators in water jars in and around residences located in Tan Chanh, Long An, southern Vietnam. Of 3,646 Heteroptera collected from such jars, Corixidae (Micronecta spp.) and Veliidae (Microvelia spp.) were revealed to be the dominant predators. Polymerase chain reaction (PCR) analysis revealed that 40% of Micronecta and 12% of Veliidae had Aedes aegypti-positive reactions, indicating that these two dominant Heteroptera are important predators of Ae. aegypti. Our results suggest that aquatic Heteroptera may be an important mosquito control agent in addition to the currently used copepods.
生活在越南缺水地区和/或自来水水质较差地区的居民，会在住所内及周围放置储水容器，如罐子，以储存日常生活用水。尽管这些水缸是已知的埃及伊蚊重要滋生地，但在越南，在这类容器中使用化学杀幼虫剂是被法律禁止的。在本研究中，我们确定了越南南部隆安省潭展地区居民住所内及周围水缸中的主要蚊虫捕食性天敌。从这些水缸中收集的3646只半翅目昆虫中，划蝽科（Micronecta属物种）和宽肩蝽科（Microvelia属物种）被发现是主要的捕食性天敌。聚合酶链反应（PCR）分析显示，40%的划蝽和12%的宽肩蝽有埃及伊蚊阳性反应，表明这两种主要的半翅目昆虫是埃及伊蚊的重要捕食者。我们的结果表明，除了目前使用的桡足类动物外，水生半翅目昆虫可能是一种重要的蚊虫控制媒介。
