Molluscicidal activity of crown of Christ (Euphorbia splendens var. hislopii)(Euphorbiaceae) latex submitted to pH variation

dc.creatorVasconcellos, Mauricio Carvalho de
dc.creatorSantos, José Augusto Albuquerque dos
dc.creatorSilva, Ivonise Paz da
dc.creatorLopes, Fátima Eliana Ferreira
dc.creatorSchall, Virgínia Torres
dc.date2014-12-10T12:32:00Z
dc.date2016-08-22T19:47:50Z
dc.date2016-08-22T19:47:50Z
dc.date2014-12-10T12:32:00Z
dc.date2003
dc.date.accessioned2023-09-26T23:35:12Z
dc.date.available2023-09-26T23:35:12Z
dc.identifierVASCONCELLOS, Mauricio Carvalho de et al. Molluscicidal activity of crown of Christ (Euphorbia splendens var. hislopii) (Euphorbiaceae) latex submitted to pH variation. Brazilian Archives of Biology and Technology, v. 46, n. 3, p. 415-420, June 2003.
dc.identifier1516-8913
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/15323
dc.identifier10.1590/S1516-89132003000300013
dc.identifier1678-4324
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8892116
dc.descriptionBioensaios de laboratório e de campo têm comprovado a especificidade da ação moluscicida do látex da Euphorbia splendens var. hislopii (coroa-de-Cristo) (Euphorbiaceae) para os moluscos das espécies Biomphalaria glabrata, B. tenagophila, B. straminea, B. pfeifferi e Bulinus sp. No presente estudo foi investigado o efeito da variação do pH na concentração letal (CL90) testada para B. tenagophila. Bioensaios com soluções aquosas do látex variando de 0,4 a 12,0 µl/l foram ajustadas aos valores de pH 5,0; 6,0; 7,0 e 8,0, e testadas de acordo com os métodos padronizados pela Organização Mundial da Saúde. Os resultados obtidos indicam que a menor concentração letal do látex ocorreu em pH 6,0 (CL90 = 3,2 µl/l) e a maior em pH 8,0 (LC90 = 10,3 µl/l). As concentrações letais (LC90) ajustadas em pH 5,0 e 7,0 foram 3,4 µl/l e 4,7 µl/l, respectivamente. A partir destes dados conclui-se que a toxicidade do moluscicida não se alterou quando as concentrações foram ajustadas em pH 5,0 e 6,0, pois observou-se que a mortalidade foi de 100% a partir da concentração de 2,0 µl/l, o que não ocorreu nas concentrações com ajuste de pH 7,0 e 8,0.
dc.descriptionLaboratory and field bioassays have confirmed the specificity of the molluscicidal activity of the Euphorbia splendens var. hislopii latex (crown of Christ) (Euphorbiaceae) over snails of the species Biomphalaria glabrata, B. tenagophila, B. straminea, B. pfeifferi and Bulinus sp. in the control of Schistosoma mansoni. In the present study, the effect of the pH variation on lethal concentration (LC90) over B. tenagophila was evaluated. Bioassays with the aqueous solutions of the latex ranging from 0.4 to 12 µl/l were adjusted for pH of 5.0; 6.0; 7.0 and 8.0, and tested in accordance with methods standardized by World Health Organization. The results obtained indicated that the minor concentration of the latex occurred at pH 6.0 (LC90 = 3.2 µl/l) and the maximum at pH 8.0 (LC90 = 10.3 µl/l). Lethal concentrations adjusted for pH 5.0 and 7.0 were 3.4 µl/l and 4,7µl/l, respectively. From the results it could be concluded that the molluscicidal toxicity was not altered when the concentrations were adjusted for pH 5.0 and 6.0, as we observed that mortality rate was 100% starting at a concentration of 2.0 µl/l, not the same for the concentrations with adjustment for pH 7.0 and 8.0.
dc.formatapplication/pdf
dc.languageeng
dc.publisherInstituto de Tecnologia do Paraná – Tecpar
dc.rightsopen access
dc.subjectMoluscicida
dc.subjectLátex
dc.subjectEuphorbia splendens
dc.subjectpH
dc.subjectEuphorbia splendens var. hislopii
dc.subjectMolluscicidal activity
dc.subjectpH variation
dc.subjectBiomphalaria sp
dc.subjectBulinus sp
dc.subjectCiências Biológicas
dc.titleMolluscicidal activity of crown of Christ (Euphorbia splendens var. hislopii)(Euphorbiaceae) latex submitted to pH variation
dc.typeArticle


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