The effect of tick infestation on the productivity of cows of three breeds of cattle

dc.contributor.authorScholtz, M.M.
dc.contributor.authorSpickett, Arthur M.
dc.contributor.authorLombard, P.E.
dc.contributor.authorEnslin, C.B.
dc.contributor.editorVerwoerd, Daniel Wynand
dc.date.accessioned2014-08-18T07:11:23Z
dc.date.available2014-08-18T07:11:23Z
dc.date.created2013
dc.date.issued1991
dc.descriptionThe articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.en
dc.description.abstractThe effect of tick infestation of Hereford, Bonsmara and Nguni cows on the weaning masses of their calves in a dipping versus non-dipping situation was investigated. Breed had a major effect on the level of tick infestation, Herefords being most susceptible and Ngunis least. The productivity of Nguni cows, as measured by the weaning masses of their calves was also least affected. The effect of infestation on the productivity of Hereford cows was the greatest and that on the Bonsmara cows was intermediate. It was estimated that each engorged female tick (predominantly Boophilus decoloratus) caused a reduction of 8,9g, 8,0g and 8,6g in the weaning masses of calves from Hereford, Bonsmara and Nguni cows respectively. The effect of infestation on the productivity of the Nguni cows was nevertheless small because a limited number of ticks fed to maturity on this breed due to its natural resistance.en
dc.description.librarianmn2014
dc.identifier.citationScholtz, MM, Spickett, AM, Lombard, PE & Enslin, CB 1991, 'The effect of tick infestation on the productivity of cows of three breeds of cattle’, Onderstepoort Journal of Veterinary Research, vol. 58, no. 2, pp. 71-74.en
dc.identifier.issn0330-2465
dc.identifier.urihttp://hdl.handle.net/2263/41382
dc.language.isoenen
dc.publisherPublished by the Agricultural Research Council, Onderstepoort Veterinary Institute.en
dc.rights©South Africa. Dept. of Agricultural Technical Services. ©University of Pretoria. Dept. of Library Services (digital).en
dc.subjectVeterinary medicineen
dc.subject.lcshVeterinary medicine -- South Africa
dc.subject.lcshTicks as carriers of diseaseen
dc.titleThe effect of tick infestation on the productivity of cows of three breeds of cattleen
dc.typeArticleen

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