Screening Results of Plants for Phytoecdysones

1056 species of plants and 351 crude drugs were screened by the Chilo dipping test looking for the phytoecdysones. 13 species of Pteridophyta and 23 species of Gymnospermae and Angiospermae were newly found to show the insect-moulting activity. The chemotaxonomical relations were discussed.

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