Duckweeds, such as Lemna minor Linnaeus (Alismatales: Lemnaceae), are common in aquatic habitats and have been suggested to reduce larval mosquito survivorship via mechanical and chemical effects. Furthermore, pond dyes are used increasingly in aquatic habitats to enhance their aesthetics, although they have been shown to attract mosquito oviposition. The present study examined the coupled effects of L. minor and black pond dye on the oviposition selectivity of Culex pipiens Linnaeus (Diptera: Culicidae) mosquitoes in a series of laboratory choice tests. Subsequently, using outdoor mesocosms, the combined influence of duckweed and pond dye on mosquito abundances in aquatic habitats was quantified. Mosquitoes were strongly attracted to duckweed, and oviposited significantly greater numbers of egg rafts in duckweed-treated water compared with untreated controls, even when the duckweed was ground. The presence of pond dye interacted with the duckweed and further enhanced positive selectivity towards duckweed-treated water. The presence of duckweed caused significant and sustained reductions in larval mosquito numbers, whereas the relative effects of dye were not evident. The use of floating aquatic plants such as duckweed, combined with dye, may help reduce mosquito populations via the establishment of population sinks, characterized by high rates of oviposition coupled with high levels of larval mortality.

中文翻译：

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水槽陷阱：浮萍和染料引诱剂减少了蚊子的数量。

浮萍，如小Lemna Linnaeus（Alismatales：Lemnaceae），在水生生境中很常见，已被建议通过机械和化学作用来减少幼虫蚊子的生存。此外，尽管已显示池塘染料可吸引蚊子产卵，但它们在水生生境中越来越多地用于增强其美观性。本研究在一系列实验室选择测试中检验了小L. L.和黑塘染料对淡色库蚊（Dilexera：Culicidae）蚊子产卵选择性的耦合作用。随后，使用室外中观，量化浮萍和池塘染料对水生生境中蚊子丰度的综合影响。蚊子被浮萍强烈吸引，与浮萍处理的对照组相比，浮萍处理过的水中的卵筏数量明显增加，即使浮萍被磨碎也是如此。池塘染料的存在与浮萍相互作用，进一步增强了对浮萍处理过的水的正选择性。浮萍的存在引起幼虫蚊数的显着且持续的减少，而染料的相对作用并不明显。浮萍等浮游水生植物与染料的结合使用，可通过建立种群库来帮助减少蚊子种群，这些种群的产卵率高，幼虫死亡率高。浮萍的存在引起幼虫蚊数的显着且持续的减少，而染料的相对作用并不明显。浮萍等浮游水生植物与染料的结合使用，可通过建立种群库来帮助减少蚊子种群，这些种群的产卵率高，幼虫死亡率高。浮萍的存在引起幼虫蚊数的显着且持续的减少，而染料的相对作用并不明显。浮萍等浮游水生植物与染料的结合使用，可通过建立种群库来帮助减少蚊子种群，这些种群的产卵率高，幼虫死亡率高。