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Arithmetic means (three highest counts for the calf crop) (±SEM) of field tick (Rhipicephalus microplus) infestations of heifer progeny of Brahman and Adaptaur sires for calf crops 1979, 1983–1984 and 1986–1988 on Belmont Research Station. Number of sires and progeny per group: Brahman, 24 sires with 159 progeny, Adaptaur maternal lineage 790546, five sires with 55 progeny, and remaining Adaptaur, 20 sires with 109 progeny.
