Conditioned aversion in sheep induced by Baccharis coridifolia

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

“…coridifolia may be the only poisonous plant in Brazil that induces an aversion naturally and continuously. Experimental studies have shown that it is possible to produce an aversion in sheep by administration of 25% of the lethal dose of B. coridifolia (ALMEIDA et al, 2009). The objectives of this study were determine the effi cacy of empirical aversion methods used to reduce the poisoning of cattle by B. coridifolia in Rio Grande do Sul, Brazil, and to establish new methods to prevent toxicity and reduce economic losses.…”

“…The poisoning occurs when animals with no previous experience with this plant are introduced into regions where B. coridifolia is present (BARROS, 1998;TOKARNIA et al, 2012;RIET-CORREA & MÉNDEZ, 2007 not ingest the plant and rarely become intoxicated (TOKARNIA et al, 2012), with the exception of recently born animals that are beginning to graze. Animals reared in areas where the plant exists are not intoxicated because they develop a strong aversion to B. coridifolia after consuming small amounts of it (ALMEIDA et al, 2009). Prevention of intoxication is based on management methods to prevent mio-mio ingestion by animals not previously exposed to this plant, especially after naïve animals are transported to infested pastures.…”

Aversão alimentar condicionada a Ipomoea carnea var. fistulosa em ovinos

“…Resultados similares foram obtidos com o LiCl em experimentos de aversão a Cercocarpus montanus em cordeiros (BURRITT & PROVENZA, 1989), a Delphinium barbeyi em vacas (RALPHS & OLSEN, 1990) e a Leucaena leucocephala em cabras (GÓRNIAK et al, 2008). Em outros trabalhos, utilizando B. coridifolia como agente aversor ao consumo de milho seco, foi observado que houve diminuição no consumo do grão durante o período de desafi os (ALMEIDA et al, 2009).…”

“…coridifolia foi utilizado com sucesso na indução de aversão condicionada ao milho em ovinos (ALMEIDA et al, 2009) e na indução de aversão a I. carnea em caprinos (ADRIEN, 2013-informe verbal). B. coridifolia ocorre no Sul do Brasil e outros países da América do Sul, sendo conhecida desde a época da colonização espanhola nas Américas pela população nativa como uma planta tóxica indutora de aversão (COBO, 1653).…”

Conditioned food aversion to control poisoning by Ipomoea carnea subsp. fistulosa in goats

“…Currently, there is no treatment for poisoning cases and control methods are ineffi cient (OLIVEIRA et al, 2009). Conditioned food aversion can be used in ruminants to avoid eating poisonous plants (RALPHS AND OLSEN, 1990;PFISTER et al, 2002;ALMEIDA et al, 2009;PIMENTEL et al, 2012). In Brazil, lithium chloride (LiCl) has been used to induce aversion to consumption of Amorimia rigida (BARBOSA et al, 2008;PACIFICO DA SILVA & SOTO-BLANCO, 2010), Leucaena leucocephala (GORNIAK et al, 2008) Turbina cordata and I. carnea (PIMENTEL et al, 2012).…”