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VetMed Resource

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Abstract

The value of the density dependent term c in the equation M=aLc relating the number of maturing females (M) of Boophilus microplus (Can.) to the number of larvae infesting cattle (L) was compared in the winter and spring of 1974 in south-eastern Queensland. On Zebu crossbred heifers, the mean...

Author(s)
Sutherst, R. W.; Utech, K. B. W.; Kerr, J. D.; Wharton, R. H.
Citation
Journal of Applied Ecology, 1979, 16, 2, pp 397-403
Abstract

Resistance to the cattle tick Boophilus microplus was assessed in heifer herds of various breeds of beef and dairy cattle in spring and summer in Queensland. All cattle had had tick experience before assessment. Resistance levels were determined as the percentage of larval ticks that failed to...

Author(s)
Utech, K. B. W.; Wharton, R. H.; Kerr, J. D.
Citation
Australian Journal of Agricultural Research, 1978, 29, 4, pp 885-895
Abstract

The effect of Boophilus microplus on steers was investigated using three levels of infestation during summer 1980, autumn-winter 1980 and summer 1981. Mean losses in liveweight per engorged female tick during each of the three periods were 0.72, 0.47 and 1.52 g per tick respectively. The 1980...

Author(s)
Sutherst, R. W.; Maywald, G. F.; Kerr, J. D.; Stegeman, D. A.
Citation
Australian Journal of Agricultural Research, 1983, 34, 3, pp 317-327
Abstract

The host resistance of Bos taurus (British) and B. indicus X B. taurus (Zebu X British) steers and heifers to cattle tick Boophilus microplus was measured monthly for 2.5 years in south-eastern Queensland. The cattle either grazed native pasture, with or without a supplement of lucerne pellets, or...

Author(s)
Sutherst, R. W.; Kerr, J. D.; Maywald, G. F.; Stegeman, D. A.
Citation
Australian Journal of Agricultural Research, 1983, 34, 3, pp 329-339
Abstract

A survey was made from late 1976 to late 1977 to determine the extent of resistance to acaricides in Boophilus microplus (Can.) in Queensland. Questionnaires and requests for samples of ticks were sent to over 900 randomly selected stock owners in the tick-infested area, which had been divided into ...

Author(s)
Roulston, W. J.; Wharton, R. H.; Nolan, J.; Kerr, J. D.; Wilson, J. T.; Thompson, P. G.; Schotz, M.
Citation
Australian Veterinary Journal, 1981, 57, 8, pp 362-371