While you may be researching or planning a program for a specific parasite that is a problem for your property, it pays to be aware of what other parasite risks may be approaching and make an integrated plan.
Programs for the key parasites, ticks, buffalo fly, lice, worms and fluke can be opened below. The recommendations are generic and therefore need to be customised to the needs of individual producers and delivered by those with knowledge in the field.
Be aware that chemical resistance can develop in both targeted and non-targeted parasites.
Use of chemicals to control one type of parasite can also unintentionally select for resistance in a different group of parasites. It is important to read the label to determine which parasites will be controlled. Resistance is a significant issue in ticks, buffalo flies and cattle worms. When choosing a chemical to control one of these parasites, consider the possible side effects of increasing selection for resistance to the others.
Strategies for delaying the emergence of chemical resistance include:
Routine worm treatment programs not required.
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)
Buffalo flies may become a problem in some areas during very wet seasons.
Beef animals. 200 flies
Dairy animals. 30 flies
Lice on cattle are generally not an economic problem. Only treat when heavily infested as indicated by rubbing on fences or structures.
Louse numbers increase
late autumn early spring
Optimal timing of treatment if needed (heavy infestation)
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.