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Insect Antifeedant Components of Senecio fistulosus var. fistulosus—Hualtata

1
Natural Resources Research Center (CIRNA), National University of the Peruvian Amazon (UNAP), Iquitos, Peru
2
Institute of Natural Products and Agrobiology (IPNA), Spanish Research Council (CSIC), 38206 Tenerife, Spain
3
Faculty of Sciences, University of Magallanes (UMAG), Punta Arenas 01855, Chile
4
University Institute of Bio-Organic Antonio González (IUBO), University of La Laguna, 38206 Tenerife, Spain
5
Institute of Agricultural Sciences (ICA), Spanish Research Council (CSIC), 28006 Madrid, Spain
*
Author to whom correspondence should be addressed.
Plants 2019, 8(6), 176; https://doi.org/10.3390/plants8060176
Received: 22 April 2019 / Revised: 17 May 2019 / Accepted: 5 June 2019 / Published: 15 June 2019
(This article belongs to the Special Issue Pesticidal Plants: From Smallholder Use to Commercialisation)
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Abstract

From a bioactive methanolic extract of Senecio fistulosus, the antifeedant effects of the alkaloidal and non-alkaloidal fractions were tested against the insects Spodoptera littoralis, Myzus persicae and Rhopalosiphum padi, with the non-alkaloidal fraction being antifeedant. The phytochemical study of the non-alkaloidal fraction of S. fistulosus, resulted in the isolation of four compounds, two 9-oxo-furanoeremophilanes (1, 2), an eremophilanolide, 1β,10β-epoxy-6-acetoxy-8α-hydroxy-eremofil-7(11)-en-8β,12-olide (3) and a maaliol derivative (4). The alkaloidal fraction yielded two known pyrrolizidine alkaloids (5, 6). Compounds 1, 3 and 4 are new natural products. Furanoeremophilane 2 was a strong antifeedant against S. littoralis and maaliane 4 inhibited the settling of M. persicae. View Full-Text
Keywords: Senecio fistulosus; antifeedant; sesquiterpene; pyrrolizidine alkaloid; structure-activity relationships Senecio fistulosus; antifeedant; sesquiterpene; pyrrolizidine alkaloid; structure-activity relationships
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ruiz-Vásquez, L.; Reina, M.; Fajardo, V.; López, M.; González-Coloma, A. Insect Antifeedant Components of Senecio fistulosus var. fistulosus—Hualtata. Plants 2019, 8, 176.

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