蚊子克星:蚊子的天敌
时间：2019-02-02 04:31:24 来源：达达文档网 本文已影响 人 
Call the automated line at Vector Control in Maricopa County, Arizona, and you’ll get a couple of odd options. You can, for example, report a “green pool” or request a bagful of fish.
The “green” refers to algae that builds up after a pool is abandoned. As the financial crisis in the US has deepened, home foreclosures have forced or frightened many homeowners into leaving their property. Untended pools, ponds, and Jacuzzis stagnate―and become breeding grounds for mosquitoes that could carry diseases such as West Nile Virus.
Antimosquito chemicals work for one to five months, depending on the dose. A longer lasting method relies on fish: tiny ones related to guppies and aptly called mosquito fish. In open water, the predators can wipe out native fish. In an enclosed body of water, they devour mosquitoes. Several states give the fish to property owners or pour them into green pools. A single fish can eat hundreds of larvae a day.
当你给亚利桑那州马里科帕县的病媒管制中心拨打电话，人工智能电话系统将给你列出几个奇怪的选择。例如，你可以上报“绿色池塘”或是申请一袋鱼。
绿色指的是池塘废弃后大量繁殖的水藻。随着美国金融危机不断升级，很多人因无力偿还房屋贷款被银行收回房产。无人打理的水塘、池塘和浴池的水停滞不流，成为滋生蚊虫的温床。而这类蚊虫可能传播诸如西尼罗病毒之类的疾病。
驱蚊药的效果依据剂量可以持续1到5个月。而一种被称作食蚊鱼的小鱼能更长久地驱蚊。在开放的水域，这种食肉鱼会将本地鱼消灭干净。但在封闭的水域，它们吞食蚊子。一条食蚊鱼每天能吃掉上百只蚊虫的卵。因此很多州给户主发放这种鱼，或者将它们倒入水藻蔓延的池塘。
（责编：张雯）
