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Home Annual Program for Cattle Annual Program for Cattle in South-western WA

Annual Program for Cattle in South-western WA


 Cattle tick is not a problem in this region

Problem ticks

  • Bush tick rise in spring or with wet season, adults most numerous in spring and summer. Routine control measures for bush tick are generally not warranted.


 Buffalo flies  Stable flies

  • Climate largely unsuitable for buffalo fly.
  • Stable flies have become a significant problem in some areas of the Swan valley and cattle may require protective treatments.


Seasonal trends

Louse numbers increase

 early winter   early spring

Optimal timing of treatment if needed (usually not required)

 early winter

Lice numbers increase from early winter 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 early winter will usually provide effective control.


Highest WECs


Significant worms

 Small brown stomach worm (Ostertagia ostertagi)

 Barber’s pole worm (Haemonchus placei)

 Small intestinal worms (Cooperia species)

Other worms

 Nodule worm (Oesophagostomum radiatum)

 Stomach hair worm (Trichostrongylus axei)

Calendar for worm and fluke control

Strategic worm treatment given each year
(√) Not a routine treatment. Indicators for treatment include scouring, sudden loss of condition and a condition score of 2 or less, especially if feed availability is less than 1,000kg DM/ha. Treatment will be more effective if combined with a change to ‘low-risk’ pastures, especially for young stock.
Fi Both adult and immature fluke present – select a drench that kills all fluke stages
(Fi) Adult and immature fluke present. This drench may not be needed on properties with a low fluke risk.
F Only adult fluke present. Use a drench other than triclabendazole to help slow the development of resistance.

Table 1. Calendar for worm and fluke control.

Class of Cattle Time of year
December-January May
Autumn born weaners/yearlings √ Weaning (√)
Spring born weaners/yearlings Drench at weaning (Mar-Apr)
Heifers/unsold yearlings (√) (√)
Adult cows Adult cows usually develop a strong immunity to roundworms so mob-scale drenching should not be required – individual cows showing reduced weight gains or signs of internal parasitism (diarrhoea, low body condition score, ill-thrift or high WEC) should be treated.
Bulls Drench 7 weeks prior to joining

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