Journal of the American Mosquito Control Association (2003) 19, 419-423

Roberto Romi, Luciano Toma, Francesco Severini and Marco Di Luca (2003)
Susceptibility of Italian populations of Aedes albopictus to temephos and to other insecticides
Journal of the American Mosquito Control Association 19 (4), 419-423
Abstract: We evaluated larval and adult susceptibility to 5 insecticides commonly used for control of Aedes albopictus, by using 15 field-collected populations from northern and central Italy, and we compared these data, collected in 2002, with those from evaluations conducted in 1992-93, 1996, and 1998-99. Larvae were tested for susceptibility to temephos and to the conventional diagnostic dosages of chlorpyrifos and fenthion proposed by the World Health Organization for Aedes aegypti. Adults were exposed to the diagnostic dosages of deltamethrin and permethrin. Overall, all of the populations tested in 2002 were still susceptible to temephos: median lethal concentration (LC₅₀) values ranged from 0.0026 to 0.0085 mg/liter, and LC₉₉ values ranged from 0.0093 to 0.023 mg/liter. These populations were also fully susceptible to chlorpyrifos and fenthion, and adults were susceptible to deltamethrin and permethrin. When comparing these data with those from previous evaluations, we observed a slight yet progressive increase in the LC₅₀ and LC₉₉ values of susceptibility to temephos, and these values are approaching the diagnostic dosage of 0.02 mg/liter proposed for Ae. aegypti. However, the implications of these findings need to be considered in light of the results of previous studies that have shown that larval Ae. albopictus are less susceptible than Ae. aegypti to organophosphate insecticides.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Roberto Romi

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aedes albopictus		Italy