title: Conditioned feed aversion as a means to prevent tulp (Homeria pallida) poisoning in cattle.
abstract: Conditioned feed aversion was investigated as a means to prevent tulp (Homeria pallida) poisoning in cattle on tulp-infested grazing. Aversion treatment with a combination of epoxyscillirosidin and lithium chloride together with a tulp-hexane extract, which served as identification factor for tulp, resulted in a significantly lower (P < 0.001) proportion of severe tulp poisoning. In a first trial where 21 averted and 21 non-averted control cattle were exposed to a tulp-infested grass pasture, only two of the averted cattle were severely poisoned compared to 13 of the non-averted control cattle. In a second trial, with cattle being exposed to a pure stand of tulp supplemented with maize residues, only two of 21 averted cattle were severely poisoned compared to 14 of 21 non-averted control cattle. Occurrence of mild tulp poisoning, however, did not differ much between averted and non-averted control cattle. The results show that conditioned feed aversion effectively restricted severe poisoning in cattle on tulp-infested grazing.
authors.affiliation: Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort, 0110 South Africa. Leendert@moon.ovi.ac.za
authors.forename: L D
authors.initials: LD
authors.lastname: Snyman
authors.forename: R A
authors.initials: RA
authors.lastname: Schultz
authors.forename: J P J
authors.initials: JP
authors.lastname: Joubert
authors.forename: K M
authors.initials: KM
authors.lastname: Basson
authors.forename: L
authors.initials: L
authors.lastname: Labuschagne
mesh_terms: D000821:Animal Feed; D000818:Animals; D001348:Aversive Therapy; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D002770:Cholenes / Q000008:administration & dosage; D004435:Eating; D005247:Feeding Behavior; D005260:Female; D005518:Food Preferences; D027621:Iridaceae / Q000506:poisoning*; D018021:Lithium Chloride / Q000008:administration & dosage; D008297:Male; D010939:Plant Poisoning / Q000517:prevention & control / Q000662:veterinary*
chemical_list: D002770:Cholenes; C110052:epoxyscillirosidin; D018021:Lithium Chloride