Determination of minimal immersion times for use in in vitro resistence tests with Boophilus microplus (Canestrini, 1887) engorged females and pyrethroid acaricides
Determination of minimal immersion times for use in in vitro resistence tests with Boophilus microplus (Canestrini, 1887) engorged females and pyrethroid acaricides
Revista Brasileira de Parasitologia Veterinaria 9(1): 33-39
2000
ISSN/ISBN: 0103-846X
The minimal immersion time for engorged females of Boophilus microplus in in vitro tests was determined. The following ixodicides were used: flumethrin, deltamethrin, cypermethrin and cyfluthrin. A total of 840 engorged females from a sensitive reference strain (Mozo) were dipped into decreasing concentrations of the ixodicides to determine their 50% effective concentration (EC50) and 99% effective concentration (EC99). Different immersion times were used.