Experimental and Applied Acarology (1996) 20, 599-605

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R.A.I. Norval, R.W. Sutherst and J.D. Kerr (1996)
Infestations of the bont tick Amblyomma hebraeum (Acari: Ixodidae) on different breeds of cattle in Zimbabwe
Experimental and Applied Acarology 20 (10), 599-605
Abstract: Infestations of adults and nymphs of Amblyomma hebraeum were counted on Brahman (Br), Brahman x Simmental (BS), Sanga (Sa) and Hereford (He) steers exposed to infested pastures at Mbizi in southern Zimbabwe in 1986-1987. Herefords were always the most heavily infested, while the Sanga tended to carry the fewest ticks with the Brahman and Brahman x Simmental groups being in between. The ratios of the engorged females on the four breeds were 2.3 : 1.4 : 1.4 : 1.0 for He : Br : BS : Sa. The ratios of the standard nymphs were 2.2 : 1.4 : 1.7 : 1.0 for He : Br : BS : Sa. The results confirm earlier observations in Africa and support the view that there are genetic differences between breeds in the expression of resistance to this tick species.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Robert W. Sutherst

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Amblyomma hebraeum Zimbabwe
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