Effectiveness of methoprene, an insect growth regulator, against temephos-resistant Aedes aegypti populations from different Brazilian localities, under laboratory conditions

被引：0

作者：

Braga, IA ^{[1
]}

Mello, CB ^{[1
]}

Montella, IR ^{[1
]}

Lima, JBP ^{[1
]}

Júnior, AJM ^{[1
]}

Medeiros, PFV ^{[1
]}

Valle, D ^{[1
]}

机构：

[1] Fundacao Oswaldo Cruz, Inst Oswaldo Cruz, Dept Entomol, BR-21045900 Rio De Janeiro, Brazil

来源：

JOURNAL OF MEDICAL ENTOMOLOGY | 2005年 / 42卷 / 05期

关键词：

methoprene; Aedes aegypti; temephos; vector control; insect growth regulator;

D O I：

10.1603/0022-2585(2005)042[0830:EOMAIG]2.0.CO;2

中图分类号：

Q96 [昆虫学];

学科分类号：

摘要：

The susceptibility of Aedes aegypti (L.) larvae from several Brazilian populations to the juvenile hormone analog methoprene and the organophosphate insecticide temephos were investigated. Populations from Natal (northeastern region), Macapa (northern region), and Jardim America, Rio de Janeiro (southeastern region) are temephos-resistant (RR90 = 24.4, 13.3, and 15.8, respectively), whereas populations from Presidente Prudente (southeastern region) and Porto Velho (northern region) exhibit only an incipient temephos-altered susceptibility status (RR90 = 1.8 and 2.6, respectively). Biochemical assays revealed alterations of the enzymes implicated in metabolic resistance, glutathione S-transferase, mixed function oxidases and esterases, among these populations. Dose-response assays showed at most a low resistance to methoprene of all populations tested, irrespective of their temephos resistance level. However, sequential exposure of Macapa and Natal populations to temephos and methoprene indicated a potential cross-resistance when larvae are exposed to both insecticides. Nevertheless, susceptibility of the Brazilian Ae. aegypti populations to methoprene alone suggests this insect growth regulator could substitute for temephos in the control of the dengue vector in the country.

引用

页码：830 / 837

页数：8

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