@conference {40214,
	title = {Developments in domestic animal embryo manipulation technology which support the application of molecular biology to animal production},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {181-190},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A simulation model for mixed infections of gastrointestinal   nematodes in lambs was used to compare with a series of extended   drenching programmes.     The model output concurs with the results of field trials showing that   preventive drenching will control parasites adequately except when   autumn conditions are particularly favourable for development and   migration of larvae onto pasture. The model suggests that the level of   pasture contamination in spring will have a significant influence on   parasite control throughout much of the year. A reduction in pasture   contamination was simulated by the addition of a post-lambing ewe drench   prior to the preventive lamb drenching programme. This gave better   parasite control and increased production compared with extended   drenching of lambs in the autumn. This is likely to be the result of   reduced larval challenge. These model predictions will require   validation in the field.    },
	issn = {1176-5283},
	author = {Tervit HR and Thompson JG and Peterson AJ}
}
