Alomar Abdullah A, Alto Barry W
Florida Medical Entomology Laboratory, University of Florida, Vero Beach, FL, 32962, USA.
J Med Entomol. 2022 Mar 16;59(2):585-590. doi: 10.1093/jme/tjab193.
Control of mosquito vectors of pathogens remains heavily dependent on the application of conventional insecticides. Pyriproxyfen (PPF) is a novel insecticide that has been proposed for use in autodissemination techniques to control mosquito vectors. The use of PPF can inhibit adult emergence but does not inhibit larval development. This feature is favorable for controlling Aedes aegypti because PPF has the potential to work in combination with natural sources of mortality (competition, predation) during the immature stages, and other control methods, including biocontrol agents that further suppress recruitment of adult mosquitoes. However, the PPF effects on life-history traits of Ae. aegypti in comparison to predatory mosquito Toxorhynchites rutilus, a source of mortality, are not fully understood. Here, we show that larval exposure to PPF concentrations that inhibit 50-90% of adult emergence in Ae. aegypti had a negligible effect on adult emergence and lifespan of Tx. rutilus. Weights of adult Ae. aegypti and Tx. rutilus were not influenced by PPF. These findings suggest that the use of PPF to control mosquito vectors may have low effects on mosquito biocontrol agents. Our results extend and confirm earlier data showing that PPF has potential to implement with Tx. rutilus to suppress Ae. aegypti and provide an additional advantage of PPF use in autodissemination control strategies.
对病原体蚊子媒介的控制仍然严重依赖于传统杀虫剂的应用。吡丙醚（PPF）是一种新型杀虫剂，已被提议用于自传播技术以控制蚊子媒介。使用PPF可以抑制成虫羽化，但不抑制幼虫发育。这一特性有利于控制埃及伊蚊，因为PPF有可能在未成熟阶段与自然死亡源（竞争、捕食）以及其他控制方法（包括进一步抑制成年蚊子繁殖的生物控制剂）协同发挥作用。然而，与作为死亡源的捕食性蚊子华丽巨蚊相比，PPF对埃及伊蚊生活史特征的影响尚未完全明确。在此，我们表明，埃及伊蚊幼虫暴露于能抑制50 - 90%成虫羽化的PPF浓度下，对华丽巨蚊的成虫羽化和寿命影响可忽略不计。成年埃及伊蚊和华丽巨蚊的体重不受PPF影响。这些发现表明，使用PPF控制蚊子媒介可能对蚊子生物控制剂影响较小。我们的结果扩展并证实了早期数据，即PPF有潜力与华丽巨蚊协同作用以抑制埃及伊蚊，并为PPF在自传播控制策略中的应用提供了额外优势。
