Table 1.

Acaricide bioassay data of different tick field isolates. Larvae from different strains and isolates were bioassayed by a larval package test under standard concentrations of the acaricides diazinon coumaphos and chlorpyrifos. The data are presented as the mortality rate (%) under a standard acaricide concentration.

	Organophosphate
Tick sample	Chlorpyrifos	Coumaphos	Diazinon
Susceptible	100	100	100
Resistant	0	0	0
Isolate C1	62.93	100	0
Isolate C2	42.1	100	0