Veterinary Preventive Medicine, Epidemiology, and Public Health Commons^™

Evaluation Of The Crack Approach For The Control Of Drench Resistance In Sheep Worms, J R. Edwards, Helen Chapman, Jon Dunsmore

Journal of the Department of Agriculture, Western Australia, Series 4

The Department of Agriculture launched the CRACK approach to worm control in September 1985 in response to finding that anthelmintic (drench) resistant worms were present on 68 per cent of a random selection of Western Australian sheep farms.

The high cost of internal parasites in terms of lost production and drench costs, together with the high prevalence of resistant worms of farms, confirmed that changes were needed to existing parasite control measures in sheep.l

A Survey Of Drench Resistance In Sheep Worms, J R. Edwards, R. Wroth, G. C. De Chaneet, R. B. Besier, J. Karlsson, P. W. Morcombe, D. Roberts, G. Dalton-Morgan

Journal of the Department of Agriculture, Western Australia, Series 4

Sheep worms which are resistant to chemical drenches have been detected with increasing freuency is Western Australia's south-western farming areas between 977 and 1980. These worms have anthelmintic resistance and such genetis resistance puts essential internal parasite control practices at risk.

This prompted veterinarians in the Esperance, Albany, Bunbury, Geraldton and Northam areas to survey farms to determine the prevalence of resistance to drenches and to define those sheep management practices which encourage its development.

This article describes the survey which was conducted to assess the extent of drench resistance, what causes its build-up and how it can be controlled …

Drenches For Treatment And Control Of Worms In Sheep : 1969 : Efficiency, Cost And Safety, W A. Halhead, G. De Chaneet

Journal of the Department of Agriculture, Western Australia, Series 4

THERE is a wide variation in the efficiency and cost of drugs for worm control in sheep.

Generally, the higher the efficiency, the greater the cost. Prices are subject to change, and may vary with the amount of drench purchased.

Sheep Worm Control And Lambing Time In High Rainfall Areas, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

Indications from a continuing sheep trial at Margaret River are that farmers in high rainfall areas could increase stocking rates and lamb growth rates by lambing in September- October rather than July-August.

The results also indicate that farmers in the area may be spending more than necessary on worm control.

Round Worms : Important Parasites Of Pigs, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

ROUND WORMS are usually found in the small intestine of pigs. The adults average six to 10 inches long. They are creamy-white and cylindrical in shape, tapering to a point at both ends.

Worms In Sheep. 4. Drenches For Treatment And Control Of Worms In Sheep, W A. Halhead

Journal of the Department of Agriculture, Western Australia, Series 4

PREVIOUS articles in this series have described the species of worms affecting sheep in Western Australia, their life histories and the factors which lead to the seasonal rise and fall in worm burdens.

A programme of strategic (preventative) drenching has been outlined which is based on a knowledge of these seasonal changes in worm burdens.

What Is The Difference?, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

A lesson to be learnt - a dose in time saves the line.

Worms In Sheep. 2. Seasonal Variations In Worm Burdens, R W. Butler

Journal of the Department of Agriculture, Western Australia, Series 4

The first article in this series described the worms which commonly infest sheep in Western Australia and the symptoms caused by heavy infestations.

This article outlines the effects of seasonal changes on worm burdens in sheep.

AS a basis for planning a worm control programme it is essential to have information on the seasonal changes in worm burdens and on the factors which control these.

In this article, the more important of these are considered.

Worms In Sheep. 3. Control Of Worms By Drenching, R W. Butler

Journal of the Department of Agriculture, Western Australia, Series 4

DRENCHING for worm control must be carefully timed in relation to the effect of climatic conditions on the development and survival of worm larvae on the pastures, and the seasonal variation in worm burdens carried by sheep.

These Worms ........ Caused This, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

THE weather had been remarkably pleasant, with an odd shower of rain followed by several warm days.

Just the weather for blowfly troubles, so the owner decided it was time he crutched his breeding flock of 500 ewes.

But as the mob approached the yards trouble was coming

Animal Husbandry Research At Bramley, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

A progress report of animal husbandry investigations at the Bramley Animal Husbandry Research Station, Margaret River.

BRAMLEY RESEARCH STATION is four miles north of Margaret River.

The average annual rainfall of 45 inches falls mainly in the winter, providing a seven-month growing season which starts in March or April.

The June-July period is excessively wet, causing extensive waterlogging of the soils.

Internal Parasites Of Cattle, J Craig, R. Butler, M. E. Nairn

Journal of the Department of Agriculture, Western Australia, Series 4

Worm parasites can have a most serious effect on cattle, even causing deaths.

This article describes the main parasites of cattle, treatment with modern anthelmintic drugs and the best means of preventing and controlling worm outbreaks.

Lambs Need Drenching At Weaning, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

RECENT losses among young lambs due to heavy infestations of black scour worm (Trichostrongylus species) have indicated that this year the problem of worms in weaners may be more troublesome than usual.

Can Worms Be Controlled By Correct Feeding?, Laurence C. Snook

Journal of the Department of Agriculture, Western Australia, Series 4

THE extensive losses which result from the ravages of internal parasites are a matter of serious concern.

Livestock owners realise this all too well and welcome advice concerning control measures which can be adopted. Unfortunately, it is not possible to give clear cut advice on the subject.

Much publicity is given to the use of drugs which will expel the worms. Various systems of strategic drenching have been developed.

It is well to remember, however, that drenching is only one of many methods which can be used to control worm infestation.

In this talk attention will be concentrated on experimental …

Some Notes On Worms In Sheep In Southern Western Australia, I W. Parnell

Journal of the Department of Agriculture, Western Australia, Series 4

DURING the last fifty or more years several surveys have been made of the worm parasites which occur in southern Western Australia.

In the 'fifties, thanks to the stimulus of Mr. H. McL. Gordon, supported by Dr. H. W. Bennetts, observations were made on the sequence of the infestations in autumn-born weaners in the country stretching from Moora to Cranbrook and Bridgetown, and later near Geraldton and Esperance.