Journal
PEST MANAGEMENT SCIENCE
Volume 74, Issue 12, Pages 2783-2792Publisher
WILEY
DOI: 10.1002/ps.5065
Keywords
botanical resources; Lycoris aurea; lycorine derivative; anti-TMV activity; insecticidal activity; fungicidal activity; field trial
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Funding
- National Natural Science Foundation of China [21672117]
- Tianjin Natural Science Foundation [16JCZDJC32400]
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BACKGROUND Lycoris aurea (L' Herit.) Herb (Amaryllidaceae) is a native pesticide in China. The ethanolic extract of Lycoris aureate bulbs, the total alkaloids of L. aurea bulbs and the main alkaloids of L. aurea bulbs were systematically investigated as part of a novel project to study their antiviral, fungicidal (phytopathogenic) and insecticidal activities. We also prepared 18 lycorine derivatives and evaluated their bioactivities. RESULTS CONCLUSION Lycorine had excellent larvicidal activity against Plutella xylostella (LC50 = 10.6 mg L-1) and was also effective during a field trial. It also showed good inhibitory activity against tobacco mosaic virus (TMV) and good fungicidal activity against Phytophthora capsici (EC50 = 7.76 mg L-1). Compounds 13 and 15 exhibited good anti-TMV activity, excellent fungicidal activity against Rhizoctonia cerealis (EC50 = 6.78 mg L-1) and excellent larvicidal activity against Culex pipiens pallens (LC50 at 0.1-0.25 mg L-1). Lycorine was identified as the main active component of L. aurea bulbs and showed potential for field application against P. xylostella. The activities of compounds 13 and 15 make them excellent candidates for new lead compounds in novel pesticide research. This study provides the basis for developing these alkaloids into potential agrochemicals. (c) 2018 Society of Chemical Industry
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