English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Plants produce arrays of secondary metabolites that act synergistically to deter and/or intoxicate herbivores. In this study, we evaluated the toxicity of piperine and β-asarone, individually and in binary mixtures, to examine their synergistic effects against larvae of two generalist herbivores,  Spodoptera litura  and  Mythimna separata . Acute toxicity of piperine after topical application was lower than that of β-asarone for second instar larvae of both  S. litura  and  M. separata  (LD 50  53.65 and 7.52 µg/larva, respectively, after 24 h). However, all mixtures produced synergistic, antifeedant effects. Mixtures of either 56.65 or 7.52 µg/larva of piperine + 18 µg/larva of β-asarone were highly synergistic in term of their acute toxicity (synergistic factor 11 and 44 for  S. litura  and  M. separata , respectively). The more concentrated mixture also had the strongest antifeedant effects when presented on artificial diet to both species,  S. litura  and  M. separata  (56.64% and 62.30% at 24 h, respectively). Our results suggest that the combination of piperine and β-asarone is a greater deterrent than either pure compound alone. Use of this mixture may provide better crop protection rather than that offered by single compounds for controlling lepidopteran pests.

international journal of pest management

Contact toxicity and antifeedant activity of binary mixtures of piperine and β-asarone against the crop pests,  Spodoptera litura  and  Mythimna separata  (Lepidoptera: Noctuidae)