Characterization of the molluscicidal activity of Bauhinia variegata and Mimusops elengi plant extracts against the fasciola vector lymnaea acuminata

Abstract

SUMMARYThe molluscicidal activity of Bauhinia variegata leaf and Mimusops elengi bark was studied against vector snail Lymnaea acuminata. The toxicity of both plants was time and concentration-dependent. Among organic extracts, ethanol extracts of both plants were more toxic.

Avaliação da atividade moluscicida de extratos vegetais sobre Achatina fulica Bowdich (Mollusca, Achatinidae)

“…Atualmente, existem várias substâncias consideradas potentes moluscicidas, mas sua ação biocida, seu alto custo e a dificuldade de seu transporte para distantes áreas rurais tornam necessário o investimento em novas pesquisas, em busca de alternativas mais bem-sucedidas de controle malacológico (Pinheiro;Cortez, 2003;Leyton et al, 2005;Singh et al, 2012). A necessidade de moluscicidas eficientes e ecologicamente aceitáveis acompanhou a tendência de se pesquisar plantas na busca de substâncias ativas para o desenvolvimento de produtos alternativos.…”

“…A necessidade de moluscicidas eficientes e ecologicamente aceitáveis acompanhou a tendência de se pesquisar plantas na busca de substâncias ativas para o desenvolvimento de produtos alternativos. Adicionalmente, a utilização de extratos vegetais no controle natural desperta atenção pelos excelentes resultados obtidos sobre moluscos aquáticos (Yadav;Singh, 2001;Singh et al, 2012). Contudo, estudos sobre a atividade de plantas moluscicidas em moluscos terrestres são pouco comuns, apesar de sua grande importância parasitológica e agrícola.…”

Anti-reproductive Activity of Chlorophyllin on Fresh Water Snail Lymnaea acuminata

“…Fasciolosis, a disease caused by two species of Fasciola viz F. gigantica and F. hepatica is cosmopolitan in occurrence (Singh et al, 2012). Parasitic flat worms found in large number in bile duct of infested cattle sheep and other mammal (Mas-Coma et al, 2009).…”

“…The liver-fluke passes to eggs in water bodies where it develops into miracidium larva, which penetrate the soft body of snail (Lymnaeidae and Planorbidae) and reaches to lymph sinuses. In lymph sinuses it metamorphosed into cercaria larva and come out from snail body and infect primary host the mammal (Agarwal and Singh, 1988;Mas-Coma et al, 2009;Singh et al, 2012). One single miracidium may produce 4000 infective larvae (metacercaria) (Boray, 2005).…”

“…Ovipositions in snails are induced by neuroendocrine hormone of caudo-dorsal cells (CDCs) in the cerebral ganglion (Ter Maat et al, 1982;Singh et al, 2008;Srivastava and Singh, 2015). An effective method to reduce the incidence of fasciolosis is to control the population of vector snails, there by breaking the life cycle of flukes, or by reducing the reproductive capacity of snails (Godan, 1983;Agarwal and Singh, 1988;Singh et al, 1996Singh et al, , 2012. Several attempts have been made to reduce the incidence of fasciolosis by using synthetic and plant derived molluscicides against snail (Singh and Agarwal, 1983;Upadhyay and Singh, 2011;Singh et al, 2012Singh et al, , 2014Hanif and Singh, 2013;Kumar et al, 2013.…”