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- W4285234519 abstract "Steroidal compounds which are closely related structurally to ecdysone are grouped as ecdysteroids. Ecdysteroids identified in plants and animals are named phytoecdysteroids and zooecdysteroids, respectively. Phytoecdysteroids are distributed in a large number of land plants (6%). Phytoecdysteroids have been recorded from 27 families of pteridophytes, 10 families of gymnosperms, and 74 families of angiosperms. Ecdysteroids are not found in all fern families, but in Polypodiaceae; it is very common. Ferns likes Pteridium aquilinum, Polypodium vulgare, Schizaea dichotoma, Cheilanthes farinosa, Cheilanthes tenuifolia, Microsorum scolopendria, Adiantum pedatum, Dryopteris nipponensis, Adiantum raddianum, Asplenium aethiopicum, Cyclosorus interruptus, Dicranopteris linearis, Diplazium polypodioides etc. more commonly synthesize Ecdysteroids . Chemically, phytoecdysteroids are triterpenoids (triterpene saponins, phytosterols, and phytoecdysteroids). Approximately, more than 300 different phytoecdysteroids have been identified. Phytoecdysteroids have the same structural features as ecdysteroids found at much higher concentrations in insects or other arthropods . Zooecdysteroids, ecdysone, and 20-hydroxyecdysone (20E) are integral to the growth and reproductive functions in arthropods . Literature reveals that phytoecdysteroids could exert deterrent or antifeedant (repellents) or toxicant or develop interfering effects or affect oviposition. It showed insecticidal (Helicoverpa armigera, Spodoptera litura, Helopeltis theivora) and miticidal (Oligonychus coffeae) activities. Monophagous insects which feed on ecdysteroids would rather starve to death than the oligophagous insects, but suffer developmental defects on the ingestion of larger amounts. Very few nonsteroidal compounds like halofenozide, methoxyfenozide, tebufenozide, and chromafenozide have also shown insecticidal activity against lepidopteran pests. Halofenozide has broad-spectrum activity against lepidopteran and coleopteran pests. Both tebufenozide and methoxyfenozide exhibit selective contact and ovicidal activity. A prominent disadvantage is that phytoecdysteroids of few plants would deter nonadapted insect predators (beneficial insects)." @default.
- W4285234519 created "2022-07-14" @default.
- W4285234519 creator A5008074786 @default.
- W4285234519 date "2022-01-01" @default.
- W4285234519 modified "2023-09-29" @default.
- W4285234519 title "Ferns, a Source of Phytoecdysones, and their Applications in Pestiferous Insect Management" @default.
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- W4285234519 doi "https://doi.org/10.1007/978-981-16-6170-9_8" @default.
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