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Abstract

Infestations of adults and nymphs of A. hebraeum were counted on Brahman (Br), Brahman × Simmental (BS), Sanga (Sa) and Hereford (He) steers exposed to infested pastures at Mbizi in southern Zimbabwe in 1986-87. Herefords were always the most heavily infested, while the Sanga tended to carry the...

Author(s)
Norval, R. A. I.; Sutherst, R. W.; Kerr, J. D.
Citation
Experimental & Applied Acarology, 1996, 20, 10, pp 599-605
Abstract

The tick A. hebraeum differs from many ixodid species in that it is not susceptible to the direct effects of the host immune response. All stages of the life cycle are able to feed repeatedly on laboratory hosts and show no progressive declines in engorged weight. However, on cattle there are...

Author(s)
Norval, R. A. I.
Citation
Insect Science and its Application, 1992, 13, 4, pp 489-494
Abstract

The effects of larvae, nymphs and adults of R. appendiculatus on the growth of Bos indicus × B. taurus (Sanga) steers and on B. taurus (Friesian × Hereford) steers and heifers was measured by exposing groups, maintained in the same pastures in Zimbabwe, to different levels of tick challenge. Larvae ...

Author(s)
Norval, R. A. I.; Sutherst, R. W.; Kurki, J.; Gibson, J. D.; Kerr, J. D.
Citation
Veterinary Parasitology, 1988, 30, 2, pp 149-164