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Effect of pre weaning and post weaning anti helminthic drenching on live weight gain and wool weight in romney ewe hoggets



Effect of pre weaning and post weaning anti helminthic drenching on live weight gain and wool weight in romney ewe hoggets



New Zealand Journal of Experimental Agriculture 4(2): 215-218



During the 2 yr period 1966-67 the production responses obtained from drenching young sheep with anthelmintics were examined in 4 trials at 2 sites in South Canterbury [New Zealand]. Compared with undrenched controls, drenching at monthly intervals from Nov. until Aug. or Sept. increased mean live-weight gain by 5.3 kg (range 3.1-9.2 kg) and mean greasy fleece weight by 0.62 kg (range 0.41-0.84 kg). Five drenches given in Nov., Jan, March, May and July achieved responses averaging 68% of the live-weight gain and 73% of the increased greasy wool production from sheep drenched at monthly intervals. Starting at the end of Oct. with 6 wk old lambs only 9% of the mean, drenching response was obtained in the 2 mo. period before weaning in late Dec. (0.35 kg), compared with 30% in Jan.-Feb. (1.05 kg), 21% in March-April (0.65 kg) and 40% in May-June (1.25 kg). No significant differences in mean liveweight gain (25.1 and 25.5 kg) or wool-weight (4.52 and 4.59 kg) were obtained when comparing thiabendazole and tetramisole drenches, respectively.

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Accession: 005263549

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