T. Chareonviriyaphap et al., Insecticide-induced behavioral responses of Anopheles minimus, a malaria vector in Thailand, J AM MOSQ C, 17(1), 2001, pp. 13-22
Citations number
24
Categorie Soggetti
Entomology/Pest Control
Journal title
JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION
This study was designed to determine the behavioral responses of 2 test pop
ulations of Anopheles minimus females to DDT at 2 g/m(2), deltamethrin at 0
.0625 g/m(2), and lambdacyhalothrin at 0.0369 g/m(2) using an improved exci
te-repellency escape chamber. One test population was colonized in 1993 and
referred to as a young colony. The 2nd field test population was collected
from Ta-Soa County, Tri-Yok District, Kanchanaburi Province, in western Th
ailand and referred to as a wild population. Results showed that females of
both young and wild test populations rapidly escaped from direct contact w
ith DDT, deltamethrin, and lambdacyhalothrin. Lambdacyhalothrin exhibited t
he strongest irritant effect on female mosquitoes, followed by DDT and delt
amethrin. Fewer females escaped from test chambers without direct contact w
ith treated surfaces but the response was significantly different from that
of the controls (P < 0.05). The noncontact response is indicative of a non
contact repellent action. Both contact irritancy and noncontact repellency
are involved in An. minimus escape responses. Experimental hut studies that
include monitoring of house-entering populations of An. minimus are needed
for a meaningful assessment of noncontact repellent actions.