ArticleJournal of chemical ecology2026
Host Rejection of the White Mustard (Sinapis alba) by a Major Oilseed Rape Pest Is Driven by the Avoidance of Sinalbin.
Article in Journal of chemical ecology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors.
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Abstract
A key postulate in chemical ecology is that specialist herbivore insects have evolved abilities to tolerate chemical defenses specific to their host plants. Nevertheless, past studies have shown that this assumption does not always hold true. Identifying the compounds responsible for this occasional paradigm shift is essential for improving our understanding of plant-insect interactions, and for the development of new control strategies against specialized insect pests. In this study, we examined the relationship between the chemistry of Sinapis alba L. (Brassicales: Brassicaceae) and adult feeding in Psylliodes chrysocephala L. (Coleoptera: Chrysomelidae), i.e., a Brassicaceae specialist and major oilseed rape pest. A variation in the ability of different S. alba cultivars to resist feeding by this insect pest was exploited to identify deterrent compounds. A comparative bioassay-guided fractionation approach led to the hypothesis that sinalbin, a glucosinolate specific to S. alba and few other brassicaceous species, might deter feeding of P. chrysocephala adults. Pure sinalbin was tested at various concentrations, confirming its deterrent effect at a concentration naturally found in leaves of two-week-old plants, i.e., 15 nmol.mg
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