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https://www.arca.fiocruz.br/handle/icict/39337
VEGETATIVE DEVELOPMENT AND SEED GERMINATION OF EUPHORBIA SPLENDENS VAR. HISLOPII. A BIOMOLLUSCICIDAL SPECIES
Author
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil
Abstract
A total of 1426 species have been tested for molluscicidal activity against the snail vectors of Schistosoma mansoni. Euphorbia splendens is one of the plants with greater molluscicidal potential. In the present paper we describe some of the propahating characteristics of E. splendens in terms of seed germinative viability under different conditions of temeperature as luminosity and under field vegetative conditions. Two peaks of E. splendens fructification were recorded in August and December. The cardinal temperatures for germination of the December seed lot were: optimum temperature of 25ºC in the light, with 80% germinations; minimum temperature of 15ºC in the dark, with 20% germination; maximum temperature of 35ºC in the light, with 5% germination. The plant reaches a mean height of 75 cm after two years of cultivation in organically fertilized sandy soil and can be used for extraction of the active principles starting on the 13th month. These results suggest that the plant presents a high potential for cultivation in Brazil for use as a molluscicide of plant origin and can be grown throughout the area of distribution of the vector snails of schistosomiasis in the country.
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