Discriminating Lethal Concentrations for Transfluthrin, a Volatile Pyrethroid Compound for Mosquito Control in Thailand | Zendy

Chutipong Sukka | Zendy; Michael J. Bangs | Zendy; Jirod Nararak | Zendy; Jeffrey Hii | Zendy; Theeraphap Chareonviriyaphap | Zendy

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Discriminating Lethal Concentrations for Transfluthrin, a Volatile Pyrethroid Compound for Mosquito Control in Thailand

Author(s) -

Chutipong Sukka,

Michael J. Bangs,

Jirod Nararak,

Jeffrey Hii,

Theeraphap Chareonviriyaphap

Publication year - 2019

Publication title -

journal of the american mosquito control association

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.424

H-Index - 61

eISSN - 1943-6270

pISSN - 8756-971X

DOI - 10.2987/19-6832.1

Subject(s) - pyrethroid , aedes aegypti , biology , toxicology , dengue fever , mosquito control , deltamethrin , anopheles , permethrin , malaria , indoor residual spraying , microbiology and biotechnology , virology , larva , pesticide , ecology , immunology , plasmodium falciparum , artemisinin

Pyrethroids are commonly used to control malaria and dengue vectors in Thailand. The lack of specific lethal discriminating concentrations (DCs) for specific mosquito species has possibly compromised more accurate assessments of physiological susceptibility to various chemicals over time. Previous studies have established DCs of various residual pyrethroids against specific mosquitoes in Thailand. However, DCs for transfluthrin (TFT), a highly volatile pyrethroid compound, against mosquito vectors in Thailand has been lacking. The aim of this study was to determine the DCs and susceptibility baselines of TFT against pyrethroid-susceptible laboratory strains of Aedes aegypti , Anopheles minimus , and An. dirus using the World Health Organization adult susceptibility tube method. Final DCs of TFT of each species were determined based on doubling the 99% lethal concentration at the following percentages: Ae. aegypti (0.06824%), An. minimus (0.06382%), and An. dirus (0.01508%). Subsequently, the respective TFT DCs were used to test field-collected populations of Ae. aegypti , An. harrisoni (Minimus Complex species), and An. dirus. Anopheles harrisoni and An. dirus were found completely susceptible (100% mortality), whereas Ae. aegypti from Nonthaburi Province was resistant to TFT. The suitability of the testing system and procedures is discussed. Routine assessment of insecticide susceptibility should include pyrethroids with high-vapor-pressure characteristics for informing control programs and consumers of product and chemical effectiveness.

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