Assessment of moluscicidal activity of the latex of three Euphorbia (Euphorbiaceae) species on Leptinaria unilamellata D'Obigny 1835 (GastropodaSubulinidae). Pulmonate terrestrial gastropods can be intermediate hosts for helminthes. The first records of chemically controlling these invertebrates date back to the beginning of the 20 th century. The substances used were unspecific toxins which were already used for controlling other pests. Synthetic molluscicides have technical limitations that stimulated a search for natural substitutes. Among the many vegetal species that have molluscicidal activity, Euphorbia cotinifolia L., Euphorbia milii des Moul. var. splendens (Bojer ex Hook) Ursch & Leandri and Euphorbia tirucalli L. call attention because of the excellent results that have been obtained when they are used on aquatic mollusks. However, studies on the activity of molluscicidal plants on terrestrial mollusks are rare, in spite of its great importance in controlling parasites and to agriculture. Anatomical and physiological similarities among species of aquatic and terrestrial mollusks suggest that chemical control strategies can be effective on both groups of invertebrates. Based on this hypothesis, we assessed the molluscicidal activity of the latex of three species of the genus Rev. Bras. Pl. Med., Botucatu, v.12, n.1, p.90-95, 2010.
RESUMOEntre as dificuldades enfrentadas pelos alunos nos cursos de ciências biológicas é a transformação de conhecimentos adquiridos nos conteúdos teóricos acadêmicos em conteúdos inteligíveis nos cursos da educação básica bem como uma interligação entre cotidiano e prática extraída desses conteúdos. Por outro lado, os alunos terão um aprendizado mais efetivo se puderem valer-se de metodologias que permitam um intercâmbio entre os conteúdos acadêmicos e a possibilidade de uma aplicação desses conteúdos em situações cotidianas. O presente trabalho tem por objetivo descrever uma metodologia que permita desenvolvimento de aspectos interdisciplinares. É um trabalho indicado para ser aplicado com alunos de graduação do curso de Ciências Biológicas utilizando o gastrópode terrestre Bradybaena similaris (Férussac, 1821) como modelo. Discute-se nesse trabalho a fisiologia do crescimento e da reprodução, a genética, ecologia e o comportamento dessa espécie. Ao final propõe-se uma metodologia de discussão e exposição dos resultados obtidos.Palavras-chave: interdisciplinaridade; gastrópode terrestre; trabalhos práticos. ABSTRACTAmong the difficulties faced by students in courses in biological sciences is the transformation of theoretical knowledge acquired in academic content into intelligible content in courses of basic education as well as a connection between everyday life and practice drawn from these contents. Furthermore, students will have a more effective learning if they can draw on methodologies that allow an exchange between academic content and the possibility of applying such content in everyday situations. This paper aims to describe a methodology that enables the development of interdisciplinary aspects. It's a job specified to apply to graduate students in Biological Sciences course using the terrestrial gastropod Bradybaena similaris (Férussac, 1821) as a model. We discuss in this work the physiology of growth and reproduction, genetics, ecology and behavior of this species. At the end we propose a methodology for discussion and display of results.
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