This region generally has non-seasonal or uniform rainfall (350–850 mm) extending to winter dominant rainfall areas within the eastern Riverina. Some areas tend to summer dominance with respect to rainfall (notably the Monaro). There are four sections within this region:
The region extends from an east-west line through Warren in the north to the NSW/Victoria border and west from the coast to a line from Nymagee (west of Nyngan and Tottenham) through to the Victorian border just west of Finlay.
This corresponds with the DrenchPlan region (NSW DPI).
These region boundaries are approximations only as seasonal temperature and rainfall variations affect worms.
The most important roundworms in this region are:
In very wet years and in areas with non-seasonal rainfall tending to summer dominance (e.g. the Monaro), especially with more than 700 mm average annual rainfall:
Also important but mainly for young sheep
In this region, barber's pole worm is generally sporadic and of short duration, therefore the Barbervax® vaccine is unlikely to be needed or cost-effective compared to 4–6 weekly monitoring of worm egg counts during high risk periods and treatment with a short-acting drench or closantel.
However, if your farm has periods of high barber's pole worm risk for several months each year (which may occur in coastal areas or on irrigated pastures) seek professional advice as to whether the Barbervax vaccine program should be considered.
Liver fluke is an internal parasite that occurs in parts of this region depending on the distribution of the intermediate host snail. It can affect sheep severely, sometimes causing deaths. The life cycle differs from the simple life cycle of roundworms, so control strategies are different.
This program relates to roundworms. To control liver fluke, see Liver fluke control.
Gastro-intestinal parasites of minor importance, such as stomach fluke and tapeworm, are not covered.