Tick resistance in Sahiwal cattle

Abstract

For 7, 21, 16 and 14 Sahiwal X British breed crossbreds with 75, 38, 38 and 38% resp. of Sahiwal blood (18-month-old bulls in the first 2 groups; 30-month-old pregnant, non-lactating females in the 3rd group; 30-month-old non-pregnant, lactating females in the 4th group), the percentages of animals highly resistant to an artificial tick infestation were 100, 61, 35 and 15, and the percentages of moderately resistant animals 0, 35, 41 and 54.