Resistance to Boophilus microplus (Canestrini) in different breeds of cattle
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. Bos indicus Brahman beef cattle were the most resistant (99 percent), followed by B. indicus x B. taurus (95-97 percent) and B. taurus British cattle (85 percent). In the dairy breeds, B. taurus Jersey cattle (98 percent) were more resistant than Guernsey (93 percent), Australian Illawarra Shorthorn (89 percent), and Friesian (85 percent), but not significally different from B. indicus x B. taurus Australian Milking Zebu (96 percent). Supplementary information on sibling bull herds showed that their resistance levels and frequency distributions of resistance were similar to those of the heifer herds
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1978
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| Subjects: | GANADO, BOVINOS, SALUD ANIMAL, ECTOPARASITOS, BOOPHILUS, RAZAS, CRUZAMIENTO, AUSTRALIA, |
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| Summary: | 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. Bos indicus Brahman beef cattle were the most resistant (99 percent), followed by B. indicus x B. taurus (95-97 percent) and B. taurus British cattle (85 percent). In the dairy breeds, B. taurus Jersey cattle (98 percent) were more resistant than Guernsey (93 percent), Australian Illawarra Shorthorn (89 percent), and Friesian (85 percent), but not significally different from B. indicus x B. taurus Australian Milking Zebu (96 percent). Supplementary information on sibling bull herds showed that their resistance levels and frequency distributions of resistance were similar to those of the heifer herds |
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