Annual Program for Cattle in Subtropical Rangelands

Ticks

 Cattle tick is not a problem in this region

• Climate largely unsuitable for ticks of economic importance to cattle so routine tick treatment programs are not required.
• Any cattle tick infestations found in the tick free area must be reported to the relevant State authority.

Flies

 Buffalo flies may become a problem in some areas during very wet seasons.

• Treat if buffalo flies are above industry threshold numbers.

Beef animals. 200 flies

Dairy animals. 30 flies

Lice

Lice on cattle are generally not an economic problem. Only treat when heavily infested as indicated by rubbing on fences or structures.

Seasonal trends

Louse numbers increase

 late autumn   early spring

Optimal timing of treatment if needed (heavy infestation)

 late autumn

Louse numbers increase from late autumn through to early spring and then decline with increasing temperatures in spring and summer. Heavy infestations are usually seen in cattle in poor body condition. In most cases the lice are a consequence, and not the cause, of poor nutritional conditions. Where lice are an on-going problem a single treatment in late autumn will usually provide effective control.

Worms

Routine worm treatment programs not required.

• A WEC at weaning is recommended.

Highest WECs

  Autumn

Other worms

Sporadic outbreaks in very wet years or due to crowding of young stock.

  Barber’s pole worm (Haemonchus placei)

  Nodule worm (Oesophagostomum radiatum)

  Small intestinal worms (Cooperia species)