Evolution of insecticide resistance in non-target black flies (Diptera: Simuliidae) from Argentina

Memórias do Instituto Oswaldo Cruz

Cristina Mónica Montagna²  Lidia Ester Gauna²  Ana Pechen De D'angelo¹  Olga Liliana Anguiano¹ 

[1] ,Universidad Nacional del Comahue Facultad de Ciencias del Ambiente y de la Salud Instituto Multidisciplinario de Investigación y Desarrollo de la Patagonia NorteNeuquén,Argentina

关键词: black fly;    insecticide resistance;    fenvalerate;    deltamethrin;    azinphos methyl;   

DOI  :  10.1590/S0074-02762012000400003

来源: SciELO

【 摘 要 】

Black flies, a non-target species of the insecticides used in fruit production, represent a severe medical and veterinary problem. Large increases in the level of resistance to the pyrethroids fenvalerate (more than 355-fold) and deltamethrin (162-fold) and a small increase in resistance to the organophosphate azinphos methyl (2-fold) were observed between 1996-2008 in black fly larvae under insecticide pressure. Eventually, no change or a slight variation in insecticide resistance was followed by a subsequent increase in resistance. The evolution of pesticide resistance in a field population is a complex and stepwise process that is influenced by several factors, the most significant of which is the insecticide selection pressure, such as the dose and frequency of application. The variation in insecticide susceptibility within a black fly population in the productive area may be related to changes in fruit-pest control. The frequency of individuals with esterase activities higher than the maximum value determined in the susceptible population increased consistently over the sampling period. However, the insecticide resistance was not attributed to glutathione S-transferase activity. In conclusion, esterase activity in black flies from the productive area is one mechanism underlying the high levels of resistance to pyrethroids, which have been recently used infrequently. These enzymes may be reselected by currently used pesticides and enhance the resistance to these insecticides.

【 授权许可】

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