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SubscribeCattle tick is not a problem in this region
Louse numbers increase
early winter early spring
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.
Autumn
Small brown stomach worm (Ostertagia ostertagi)
Barber’s pole worm (Haemonchus placei)
Small intestinal worms (Cooperia species)
Nodule worm (Oesophagostomum radiatum)
Stomach hair worm (Trichostrongylus axei)
KEY | |
---|---|
√ | 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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