Neo-clerodane diterpenoid insect antifeedants from Ajuga reptans cv catlins giant

14,15-dehydroajugareptansin, one of three new neo-clerodane diterpenoids isolated from Ajuga reptans, exhibits significant antifeedant activity against Spodoptera littoralis larvae. Three new neo-clerodane diterpenoids (14,15-dehydroajugareptansin, 3β-hydroxyajugavensin B and 3α-hydroxyajugamarin F4...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1998-04, Vol.47 (7), p.1227-1232
Main Authors: Bremner, Paul D., Simmonds, Monique S.J., Blaney, Wally M., Veitch, Nigel C.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Chemical control
Control
Fundamental and applied biological sciences. Psychology
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
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Summary:14,15-dehydroajugareptansin, one of three new neo-clerodane diterpenoids isolated from Ajuga reptans, exhibits significant antifeedant activity against Spodoptera littoralis larvae. Three new neo-clerodane diterpenoids (14,15-dehydroajugareptansin, 3β-hydroxyajugavensin B and 3α-hydroxyajugamarin F4), have been isolated from aerial parts of Ajuga reptans cv Catlins Giant, together with the known compound, ajugareptansin. The structures were determined by 1H and 13C NMR spectroscopy and MS. Insect antifeedant testing of all four compounds revealed that 14,15-dehydroajugareptansin had significant activity against sixth stadium larvae of Spodoptera littoralis.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(97)00706-1