Open AccessIrritability and repellency of synthetic pyrethroids on an Aedes aegypti population from Thailand
Author(s) -
Mongkalangoon Piti,
Grieco John P.,
Achee Nicole L.,
Suwonkerd Wannapa,
Chareonviriyaphap Theeraphap
Publication year - 2009
Publication title -
journal of vector ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.688
H-Index - 51
eISSN - 1948-7134
pISSN - 1081-1710
DOI - 10.1111/j.1948-7134.2009.00029.x
Subject(s) - aedes aegypti , biology , irritability , population , insecticide resistance , zoology , aedes , toxicology , virology , ecology , dengue fever , genetics , environmental health , larva , medicine , menopause
The main objective of this study was to find the optimal dosage of deltamethrin, cyphenothrin, d‐tetramethrin, and tetramethrin that would elicit repellency and irritability responses of Aedes aegypti. The F1‐F3 generations of field mosquitoes collected from Pu Teuy Village, Sai‐Yok District, Kanchanaburi Province, Thailand, were tested with four pyrethroids to determine the LC 25 , LC 50 , and LC 99 . These concentrations were 0.010%, 0.020%, and 0.055%, respectively, for deltamethrin; 0.113%, 0.167%, and 0.353%, respectively, for cyphenothrin; 2.091%, 2.770%, and 5.114%, respectively, for d‐tetramethrin; and 2.377%, 4.251%, and 10.715%, respectively, for tetramethrin. All dosages were tested in the excito‐repellency system. Survival analysis was used to compare each chamber of the test. It was found that cyphenothrin had a stronger repellent effect than the other pyrethroids, while the contact irritant effect was similar among compounds tested. The LC 50 of each pyrethroid was found to be the optimal dose for repelling Ae. aegypti . There was no significant difference in LC 99 values for either non‐contact or contact trials for each pyrethroid.