Controlling and eradicating cattle ticks is extremely important to the viability of the cattle industry. Cattle ticks are the most serious external parasite of cattle in Australia. The tick can carry the disease ‘tick fever’, which can kill cattle and has the potential to cause significant economic damage to the beef cattle and dairy industries of NSW.
There is an AgFact on them here. The only method of control is dipping.
Cattle ticks can be seen at any time of the year, but they mainly occur from late spring to midwinter. The numbers found on cattle increase rapidly from summer to autumn, reaching a peak on the north coast of NSW in late autumn to early winter. They decline with the onset of colder weather.
How to identify cattle ticks can be seen here