The numbers of bush ticks, Haemaphysalis longicornis, parasitic on grazing cattle before and after the acquisition of host resistance

The numbers of bush ticks, Haemaphysalis longicornis, on Bos taurus steers in south east Queensland was recorded regularly from July 1971 until January 1974. The steers had no prior exposure to the tick. The parasitic tick population was large during the first year, but declined to low levels in the second and third years, apparently as a result of the steers acquiring resistance to tick feeding.