Journal of the Department of Agriculture, Journal of the Department of Agriculture, Western Australia, Series 3 Western Australia, Series 3
Volume 7
Number 3 May-June, 1958 Article 6
5-1958
Molybdenum poisoning of stock Molybdenum poisoning of stock
P. B. Lewis
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Recommended Citation Recommended Citation
Lewis, P. B. (1958) "Molybdenum poisoning of stock," Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 7: No. 3, Article 6.
Available at: https://library.dpird.wa.gov.au/journal_agriculture3/vol7/iss3/6
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f POISONING OF STOCK
By P. B. LEWIS, Veterinary Surgeon
^ ^ ^ ^ ^ ^ ^ ^ • ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ » ^ ^ ^ ^ ^ ^ » ^ ^ ^ ^ » ^ ^ ^ ^ ^ ^ ^ ««.
"V/J OLYBDENUM has been found beneficial in parts of the State used as a fertiliser
•*•*•*• constituent for pasture. It is only needed in small quantities and should not be used at a greater rate or more frequently than is recommended.
Excess molybdenum in the feed may affect cattle, sheep a n d goats. Foals nursed on mares fed on high molybdenum diets have shown signs of poisoning.
Broadly speaking t h e element has the effect of depressing t h e ability of a n animal to use copper in the feed, and also appears to cause the movement of the ele- ment phosphorus from the bones causing rarefication and weakening of them.
Various symptoms have been ascribed to molybdenum poisoning and may vary from unexplained poor performance, p a r - ticularly of young stock, to severer con- ditions with scouring, emaciation, weak- ness, painful joints, etc.
Other effects described have been:—
(1) Change of the normal gait of m a t u r e animals to a "pacing"
gait. Both legs of the same side of the animal move forward t o - gether. This is painful to t h e animal.
(2) Ends of the long bones, particu- larly of young animals, are en- larged, resembling rickets.
(3) In older animals the weakening of the bones causes a tendency to frequent fractures.
(4) There appears to be a tendency for an increase in the percentage of abnormal calves born. These may be premature (7 to 8 m o n t h s ) . (5) In severe poisoning, sterility oc-
curs in both males and females, and apparently this is p e r m a n e n t in the case of the bull. In t h e case of the female there is a failure to come into season which can be corrected by copper supplements.
(6) In some cases sudden d e a t h due to heart failure has been blamed on excess molybdenum causing a copper deficiency.
FREE SERVICE TO FARMERS
Do yon know that the Department of Agriculture provides a comprehensive service of advice and technical assistance to farmers, free of charge?
When in need of advice, get in touch with your District Officer whose name and headquarters township will be found in the list of Departmental personnel on Pages 266 and 267.
These officers are there to help you and will make personal visits to your property to assist with on-the-spot advice. In addition, they will, where necessary, arrange for the services of specialist officers—all without cost to you.
Journal of agriculture Vol. 7 1958
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Please mention the "Journal ol Agriculture of W.A.." when writing to advertisers Journal of agriculture Vol. 7 1958
