Controlling Mosquito Larvae in Water: The Basics on Mosquito 杀幼虫剂

根据 Joint Statement on Mosquito Control in the United States from the U.S. 美国环境保护署(EPA)和美国环保署.S. Centers of Disease Control 和 Prevention (CDC), “…The greatest control impact on mosquito populations will occur when they are 集中, 不动 和 可访问的.”  This emphasizes the importance of controlling mosquitoes at their larval, 以水为基础的发展阶段, 在它们飞出来之前, 咬的成年人. 灭蚊幼虫产品, 俗称杀幼虫剂, are applied to water sources used for mosquito breeding 和 prevent larvae from becoming flying 和 咬的成年人.

At first glance, the upfront cost of larval control products can appear to be prohibitive. But larval mosquito control, when done correctly, may 减少 the number of adult control treatments needed to deliver 和 maintain nuisance 和 disease control in your district or county. 事实上, one mosquito control program in Florida found they could nearly eliminate adult control applications once they began implementing larval control as a core part of their mosquito management program.

什么时候使用杀幼虫剂最好?

最简单的答案是, the best time to use larval control products is when you have active or anticipated mosquito breeding in a water source.  然而, knowing this is more nuanced – taking into consideration your region 和 climate, 栖息地类型, 物种混合, 以及检查和监督工作, plus historical data on breeding activity 和 arbovirus disease cycles. 不管这些因素, the common denominator for mosquito breeding is always st和ing water.

杀幼虫剂 are often used early in an integrated mosquito management program to suppress overall populations. 最终, treating mosquito breeding water sources with larval control products helps limit the number of adult mosquitoes that will fly 和 bite, therefore reducing nuisance levels 和 the potential for endemic arbovirus disease cycles, 比如西尼罗河病毒.

What active ingredients are used for controlling mosquito larvae?

There are four main active ingredients 和 modes of action available among EPA-registered larval control products for public health mosquito control.

1. Bacillus thuringiensis (Bti) 和 Bacillus sphaericus (Bsph) – a Class 11A/11B bacterial pesticide for larval control.  Fourstar® 产品就是这样一个使用Bti/ b的品牌.
2. S-methoprene – a Class 7A growth regulator found in Altosid-br和产品除其他外. Growth regulators work to halt the mosquito life cycle, preventing larvae from ever developing into adults.
3. Spinosad, a product of a naturally-occurring soil bacterium. This is a Class 5 pesticide for controlling all four stages of mosquito larvae.  天然®产品含有Spinosad.
4. 杀幼虫油之类的 CocoBear® 对水面呼吸的幼虫起到窒息作用.

灭蚊幼虫剂的作用时间是多久?

Generally, larvicide product options will fall into two categories related to the length of control:

1. Single brood products are intended to last for just one larval cycle or brood. They work within the first 24-48 hours of application. If continued breeding in the treatment sites is detected through ongoing inspection, follow-up applications may be needed on a weekly basis. This product type is often the right choice for temporary st和ing water sites, such as woodl和 pools that form in the spring as a result of snow melt or heavy seasonal rains.
2. Multi-brood or residual control products will typically control mosquito larvae in a water source for 14 or more days. Depending on the product formulation 和 application site, some multi-brood products can control larvae for up to 180 days. Multi-brood products are often an operationally efficient 和 effective choice for breeding habitats that nearly always have water present, 如集水盆或雨水渠.

如何使用杀蚊幼虫剂?

You will find larvicide products come in many formulations, 如药片或砖, 液体, 以及各种类型的颗粒产品除其他外.  和, 它们可以以许多不同的方式应用, 包括手工, 通过吹风设备, 甚至从飞机上, 直升机, 和无人驾驶飞机. There is no one “right” formulation or application method. The beauty in all this variation is that you have options for all species, 所有繁殖栖息地, 以及所有的申请网站.

Wondering if your program has optimized the use of larvicides for proactive mosquito population suppression?  我们的防蚊专家在这里提供帮助.  请在这里免费咨询.