are conspicuous and gorgeous elements of biodiversity which occurs in various kinds of habitats ranging from sea level to mountain top and tropical to subpolar regions (6).With reference to Cyathea species, Janakiraman and Johnson (7) studied the presence of phenolics, flavonoids, tannins, cardiac glycosides, terpenoids, steroids, saponins and alkaloids in C. nilgirensis, C. gigantea and C. crinita.Janakiraman and Johnson (8) determined the functional constituents of C. nilgirensis, C. gigantea and C. crinita.using FT-IR.Janakiraman and Johnson (9) studied the antioxidant potentials of C. nilgirensis, C. gigantea and C. crinita.Janakiraman and Johnson (10) revealed the phenolics profile of tree ferns using HPTLC analysis.Janakiraman and Johnson (11) studied the chemical constituents of tree ferns using GC-MS analysis.Janakiraman and Johnson (12) confirmed the cytotoxic activity of ethanolic extracts of selected Cyathea species against MCF 7 cell line cultures.Hence, the present study was undertaken to study the larvicidal potential of various extracts of Cyathea nilgirensis Holttum, Cyathea gigantea (Wall.ex.Hook.)Holttum and Cyathea crinita (Hook.)Copel. Materials and methods Collection of plant materialsSamples for the present study were collected from different parts of Tamil Nadu, South India.
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Antonysamy et al. (2017) studied this question.
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