Methods of inducing conditioned food aversion to Baccharis coridifolia (mio-mio) in cattle

Ciência Rural

Milton Begeres De Almeida²  Ana Lucia Schild¹  James Pfister¹  Marcelo Pimentel¹  Karine Maciel Forster¹  Franklin Riet Correa¹ 

[1],Universidade Federal do Pará (UFPA) Faculdade de Medicina Veterinária Castanhal PA ,Brasil

关键词: Baccharis coridifolia;    cattle;    food-conditioned aversion;    plant poisoning control;    Baccharis coridifolia;    bovino;    aversão alimentar condicionada;    controle de intoxicação por plantas;   

DOI  :  10.1590/S0103-84782013001000022

来源: SciELO

【 摘 要 】

Three experiments were performed to determine the efficacy of various methods of averting naïve cattle to prevent Baccharis coridifolia poisoning: forced oral administration of 0.5g kg-1 body weight of fresh B. coridifolia; forced inhalation of the smoke from burning B. coridifolia and rubbing the plant on the animals' muzzles and mouths; and introducing the animals into paddocks with low invasion by B. coridifolia. Results demonstrated that cattle forced to ingest low doses become strongly averted if introduced into paddocks 23-26 hours after the aversion. In contrast, cattle introduced into the paddocks between 1-10 hours were not fully averted. Inhalation of B. coridifolia smoke, and rubbing the plant on the animals' muzzles and mouths were not efficient to induce an aversion. The introduction of cattle into paddocks with approximately 1% of B. coridifolia was efficient if the animals remained 5 months in the area, but not if they only remained for 60 hours, as cattle required sufficient time to learn to avoid the plant.

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