JOURNAL 844
Records of Natural Products
VOLUME & ISSUE
Year: 2019 Issue: 1 January-February
Year: 2019 Issue: 1 January-February
PAGES
p.81 - 84
p.81 - 84
STATISTICS
Viewed 2372 times.
Viewed 2372 times.
AUTHORS
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Takahiro Ishii, Yuto Shinjo, Miyu Miyagi, Hiroshi Matsuura, Tsuyoshi Abe, Norio Kikuchi and Minoru Suzuki
GRAPHICAL ABSTRACT
ABSTRACT
Three known secondary metabolites were isolated from the organic extract of Laurencia intricata. Their structures were identified by NMR and MS experiments and comparison with the literature data. An aromadendrane sesquiterpene, (+)-cyclocolorenone showed strong repellent activity against the maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) adults. It had the same activity as natural insecticides, pyrethrins, with a ED 50 value of 2.0 m g/cm 2. This is the first report of insect repellent activity of (+)-cyclocolorenone. The results suggest that the red alga Laurencia is a promising source of bioactive compounds which can be used as potential biocontrol agents for stored-product insects.
KEYWORDS- Cyclocolorenone
- insect repellent activity
- Sitophilus zeamais
- Laurencia intricata