LC50 baselinelevels of amitraz, coumaphos, fluvalinate and flumethrin in populations of Varroa destructor from Buenos Aires Province, Argentina.
Matías D. Maggi, Sergio R. Ruffinengo, Liesel B. Gende, Martín J. Eguarasand Norma H. Sardella
This study estimates the LC50 baseline levels for amitraz, coumaphos, fluvalinate, and flumethrin in susceptible Varroa destructor populations in Argentina. Concentration response bioassays were conducted with each acaricide. Laboratory results of lethal concentrations (LC50) were: 0.1 µg/dish for amitraz; 0.29 µg/dish for fluvalinate; 0.34 µg/dish for flumethrin; and 0.57 µg/dish for coumaphos, respectively. All tests guaranteed 100 % bee survival. LC50 references for mite populations susceptible to the most commonly used acaricides were thus established for Argentina, which will aid the establishment of integrated pest management programmes for V. destructor.