Comparison of the insecticide susceptibilities of laboratory strains of Aedes aegypti and Aedes albopictus

Abstract

A susceptible strain of Aedes albopictus derived from the Gainesville strain (Florida, USA) was established in our laboratory. The larvicidal efficacies of the neurotoxic insecticides temephos, permethrin and the pure cis and trans-permethrin isomers and the microbial insecticide Bacillus thuringiensis israelensis (Bti) against Ae. albopictus were estimated and compared to a susceptible strain of Aedes aegypti. The larvicidal effect of insect growth regulator pyriproxyfen was also evaluated in both mosquito strains. The median lethal concentration/median emergency inhibition values for Ae. aegypti and Ae. albopictus, respectively, were: temephos, 3.058 and 6.632 ppb, permethrin, 3.143 and 4.933 ppb, cis-permethrin, 4.457 and 10.068 ppb, trans-permethrin, 1.510 and 3.883 ppb, Bti, 0.655 and 0.880 ppb and pyriproxyfen, 0.00774 and 0.01642 ppb. Ae. albopictus was more tolerant than Ae. aegypti to all six larvicides evaluated. The order of susceptibility for Ae. aegypti was pyriproxyfen > Bti > trans-permethrin > temephos > permethrin > cis-permethrin and for Ae. albopictus was pyriproxyfen > Bti > trans-permethrin > permethrin > temephos > cis-permethrin. Because both species can be found together in common urban, suburban and rural breeding sites, the results of this work provide baseline data on the susceptibility of Ae. albopictus to insecticides commonly used for controlling Ae. aegypti in the field

Geometric Morphometrics of Nine Field Isolates of Aedes aegypti with Different Resistance Levels to Lambda-Cyhalothrin and Relative Fitness of One Artificially Selected for Resistance

“…In Culex pipiens , the organophosphate resistance was associated with a smaller adult size [12], [45]; but Ae. albopictus resistance to permethrin was associated with larger size when compared with the susceptible strain [46], [47]. Aedes aegypti females exposed to sublethal doses of Spinosad were significantly larger than control females; male survivors, in contrast, were significantly smaller than controls [48]; although, resistance level to Spinosad was not reported.…”

Electrophysiological and behavioural response of Aedes albopictus to n‐heinecosane, an ovipositional pheromone of Aedes aegypti

“…These colonies were reared since 1996 and 2010, respectively, in our insectary at 25 AE 2°C, 80-90% r.h., and L12:D12 photoperiod and have been free of exposure to pathogens, insecticides, or repellents (Seccacini et al, 2006;Gomez et al, 2011). albopictus (derived from the USDA strain from Gainesville, FL, USA) were used as susceptible reference strains.…”

Temporal variation of wing geometry in Aedes albopictus

“…For instance, the evolutionary changes within a species may produce populations that are resistant to insecticides (Braga et al 2004, da-Cunha et al 2005, Gómez et al 2011, Fontoura et al 2012 or may alter their vectorial capacity (Almeida et al 2005, Freitas 2010). Although microevolution has been investigated in the congeneric dengue vector Aedes aegypti (Lourenço-de-Oliveira et al 2004, Costa-Ribeiro et al 2007, Vidal & Suesdek 2012, the knowledge of microevolution in Ae.…”