Insecticide Resistance In Cimex Lectularius (Hemptera: Cimicidae) In Australia

Abstract:
Insecticide resistance in bed bugs (Cimex lectularius L. and C. hemipterus F.) is a major factor in the pest’s resurgence. Various studies have demonstrated resistance to the pyrethroids, carbamates and the organophosphates. Resistance has been suspected in Australia, with anecdotal reports of poor product performance. Laboratory studies have demonstrated insecticide resistance in a previously suspected-resistant field strain of bed bugs, with substantial differences in LD50 values when compared to a susceptible strain. The resistance factors for each compound were: permethrin = 1.4 million, deltamethrin = 430,000, bendiocarb = 240, pirimiphos-methyl = 2.8, imidacloprid = 2.7. Resistance was confirmed in the field-collected strain with the pyrethroids and carbamates, but not the organophosphates or neonicotinoids. Professional pest management operations require the development of new strategies to combat the pest. Regulatory authorities must consider the implications of resistance to multiple insecticide groups when registering new products utilizing either existing or new modes of action.