Larvicidal activity of Magnolia denudata seed hydrodistillate constituents and related compounds and liquid formulations towards two susceptible and two wild mosquito species.

Autor(es): Wang Zhang-Qian; Perumalsamy Haribalan; Wang Mo; Shu Shaohua; Ahn Young-Joon

Resumo: Anopheles sinensis, Aedes aegypti and Aedes albopictus and Culex pipiens pallens mosquitoes transmit malaria, dengue fever and West Nile virus diseases respectively. This study was conducted to determine the toxicity of 17 constituents from Magnolia denudata seed hydrodistillate (MD-SHD) and four experimental MD-SHD liquid formulations (10-50 mg L(-1) liquid) to third-instar larvae from insecticide-susceptible Cx. p. pallens and Ae. aegypti as well as wild Ae. albopictus and An. sinensis. 2,4-Di-tert-butylphenol was the most toxic constituent (LC50 1.98-3.90 mg L(-1) ), followed by linoleic acid (7.19-10.49 mg L(-1) ), towards larvae of the four mosquito species. High toxicity was also produced by nerolidol, (?)-limonene, ?-terpinene and ?-terpinene (LC50 9.84-36.42 mg L(-1) ). The toxicity of these compounds was virtually identical towards larvae of the four mosquito species, even though An. sinensis larvae were resistant to deltamethrin and temephos. The MS-SHD 50 mg L(-1) liquid resulted in 92-100% control towards larvae of the four mosquito species, while commercial temephos 200 g L(-1) emulsifiable concentrate was almost ineffective towards An. sinensis larvae (30% mortality). Reasonable mosquito control in the aquatic environment can be achieved by MD-SHD 50 mg L(-1) liquid as a potential larvicide. ? 2015 Society of Chemical Industry.

Imprenta: Pest Management Science, v. 72, n. 5, p. 897-906, 2016

Identificador do objeto digital: 10.1002/ps.4064

Descritores: Aedes aegypti - Viral infections ; Aedes aegypti - Virus ; Aedes aegypti - Larvicide ; Aedes aegypti - Dengue

Data de publicação: 2016