Plantas Do Cerrado Brasileiro Como Possíveis Agentes Moluscicidas

Abstract

The biome Cerrado is characterized as the most diversified savannah in the world, containing about one third of Brazilian biodiversity. In this study we used the typical vegetal species of this biome, Davilla elliptica and Davilla nitida with the aim of obtaining hydroalcoholic extracts for tests against Lymnaea columella snails intermediate hosts of the parasite Fasciola hepatica, which causes fasciolosis. This parasitosis is a high importance disease in the veterinary medicine due to the great economic losses that it causes. Among the several methods used to reduce the number of cases of the disease, the control of snail"s populations may be a promising measure. In addition, the search to discovery new molluscicides from vegetal species has been increasing, since the use of niclosamide (N-(2'-chloro-4'nitrophenyl) -5-chlorosalicylanilide), only substance to help control the proliferation of snails can generate serious environmental problems such as toxicity to other species. Thus the objective of this study was to analyze the efficiency of hydroalcoholic extracts of D. elliptica, D. nitida, as possible molluscicidal agents for the L. columella species. The hydroalcoholic extracts of D elliptica and D. nitida presented molluscicidal activity against L. columella species, being that D. elliptica presented more promising results, triggering both molluscicidal and ovicidal effects, which suggests that this vegetal extract can be used in tests as an alternative control of this parasitosis. TABELA 2Teste de inibição de ovoposição ConclusõesAssim, pode-se concluir que os extratos hidroalcoólicos de D. nitida e D elliptica apresentaram atividade moluscicida contra a espécie L. columella, sendo que D. elliptica apresentou resultados mais promissores, desencadeando efeitos tanto moluscicidas como e ovicidas, nos testes realizados o que a credencia, para a utilização em ensaios de campo, contra moluscos da espécie L. columella, hospedeiros intermediários para o parasito Fasciola hepatica.