Antifeedant and ovicidal activities of a new cassane and other compounds from Caesalpinia welwitschiana Oliv. and Caesalpinia bonduc L. against Tuta absoluta (Lepidoptera: Gelechiidae)

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Antifeedant and ovicidal activities of a new cassane and other compounds from Caesalpinia welwitschiana Oliv- abstarct.pdf (98.66 KB)
Date
2020
Authors
Flaure, Rosette Ehawa Essounga
Mba’ning, Brice Mitterant
Tcho, Alain Tadjong
Chhabra, Sumesh Chander
Mohamed, Samira Abuelgasim
Lenta, Bruno Ndjakou
Ngouela, Silvere Augustin
Tsamo, Etienne
Hassanali, Ahmed
Cox, Russell John
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis Group
Abstract
Methanolic extracts of liana of Caesalpinia welwitschiana and leaves of C. bonduc were found to possess moderate antifeedant and ovicidal activities against Tuta absoluta. Bioassay-guided isolation of constituents from the most active fraction of C. welwitschiana led to the identification of four known compounds [isobonducellin 1a and bonducellin 1 b, intricatinol 2, (-)-epigallocatechin-3-O-gallate 4] and one new constituent [welwitschianic acid 3]. The most active fraction of C. bonduc afforded two known constituents neocaesalpin L 5 and neocaesalpin A 6. The isolated structures were elucidated on the basis of their MS, UV, IR and 1 & 2 D NMR spectra and by comparison with literature data. Compounds 2, 4-6 were showed antifeedant and ovicidal properties against T. absoluta, some comparable to that of azadirachtin at 50, 100 and 200 ng/ml. Overall, the present study, conclude that the two species of the plant could be a promising source of ecofriendly botanical constituents.
Description
A research article published in Natural Product Research Formerly Natural Product Letters
Keywords
Cassanes, flavonoides, Tuta absoluta, Antifeedant, Oviposition, Caesalpinia bonduc, Caesalpinia welwitschiana
Citation
Flaure Rosette Ehawa Essoung , Brice Mitterant Mba’ning , Alain Tadjong Tcho , Sumesh Chander Chhabra , Samira Abuelgasim Mohamed , Bruno Ndjakou Lenta , Silvere Augustin Ngouela , Etienne Tsamo , Ahmed Hassanali & Russell John Cox (2020): Antifeedant and ovicidal activities of a new cassane and other compounds from Caesalpinia welwitschiana Oliv. and Caesalpinia bonduc L. against Tuta absoluta (Lepidoptera: Gelechiidae), Natural Product Research, DOI: 10.1080/14786419.2020.1825424
URI
https://www.tandfonline.com/doi/pdf/10.1080/14786419.2020.1825424
 http://ir-library.ku.ac.ke/handle/123456789/20520
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RP-Department of Chemistry