Growth of Haemaphysalis (Kaiseriana) longicornis on cattle. |
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| Authors: | B M Wagland J A Roberts R W Sutherst |
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| Institution: | 1. Division of Animal Health, CSIRO, Long Pocket Laboratories, Indooroopilly, Queensland 4068, Australia;2. Division of Entomology, CSIRO, Long Pocket Laboratories, Indooroopilly, Queensland 4068, Australia |
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| Abstract: | Increases were recorded of lengths of larvae, nymphs and females of the tick, Haemaphysalis (Kaiseriana) longicornis during feeding on cattle, so that categories could be established for estimating the ages of ticks in natural populations. Most larvae and nymphs engorged in 4 days and females in 5 or 6 days. Four age categories were defined for larvae and 3 for nymphs. The growth of females was variable but 4 stages of physiological development were defined based on changes in their lengths. The lengths were determined of each instar 24 h before detachment to enable estimation of the numbers maturing each day on cattle in the field. |
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| Keywords: | Ixodidae tick growth tick lengths age categories parasitic development bush ticks host resistance tick feeding |
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