Showing papers on "Azadirachta published in 1972"
TL;DR: In this article, a triterpenoid alcohol, meliantriol, isolated from the fruit of A. indica, was shown to have an antifeedant effect against locusts and lepidopterous larvae.
Abstract: EXTRACTS of the seeds and leaves of the neem tree, Azadirachta indica, are repellent to insects such as locusts1, 2. Extracts of the closely related Persian lilac or Chinaberry, Melia azaderach, have also been shown to have an antifeedant effect against locusts3 and lepidopterous larvae4. A triter-penoid alcohol, meliantriol, isolated from the fruit of A. indica, inhibits the feeding of Schistocerca gregaria5. Butterworth and Morgan6 isolated a highly oxidized triterpenoid named azadirachtin from seeds of A. indica, which inhibits the feeding of S. gregaria, both when supplied on sucrose-impregnated filter paper6, 7 and when absorbed by the food plant8.
118 citations
TL;DR: Azadirachtin (C35H44O16), isolated from the seeds of the Neem tree and found to be highly active in inhibiting the feeding response of the desert locust (Schistocerca gregaria), has been shown to be a highly oxygenated triterpenoid substance, with fourteen of the oxygen atoms deployed in five ester groups, three free hydroxy-groups and a dihydrofuran ring; the remaining oxygen atoms are tentatively assigned to two ether groups as discussed by the authors.
Abstract: Azadirachtin (C35H44O16), isolated from the seeds of the Neem tree (Azadirachta indica) and found to be highly active in inhibiting the feeding response of the desert locust (Schistocerca gregaria), has been shown to be a highly oxygenated triterpenoid substance, with fourteen of the oxygen atoms deployed in five ester groups, three free hydroxy-groups and a dihydrofuran ring; the remaining oxygen atoms are tentatively assigned to two ether groups.
52 citations
Dissertation•
01 Jan 1972
33 citations
TL;DR: The expression of morphogenesis by excised embryo and by decapitated seedling in the absence of any of the oft-employed growth substances makes A. indica a rewarding system for experiments on cell differentiation and organogenesis.
14 citations