Journal
JOURNAL OF CHEMICAL ECOLOGY
Volume 29, Issue 11, Pages 2575-2584Publisher
KLUWER ACADEMIC/PLENUM PUBL
DOI: 10.1023/A:1026318203775
Keywords
Coptotermes formosanus; feeding; fecundity; termites; flavonoid; flavone; isoflavone; genistein; biochanin A; apigenin; quercetin; glyceollin; survival
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Fecundity, mortality, and food consumption of the Formosan subterranean termite, Coptotermes formosanus Shiraki, were evaluated in response to five plant flavonoids ( genistein, biochanin A, apigenin, quercetin, and glyceollin). Apigenin fed at 50 mug/primary reproductive pair proved to be the most toxic flavonoid. Biochanin A was most effective in reducing fecundity. Subsequently, these two flavonoids were tested through oral feeding and topical application at 100-mug dose. Significant reduction in the numbers of progeny was evident for biochanin A in both treatment methods. Choice feeding tests with termite workers showed that initially termites were attracted to filter paper treated with biochanin A, but over a period of 72 hr, consumed significantly less material when compared to controls. Biochanin A is a promising phytochemical with ability to reduce fecundity in primary reproductives of the Formosan subterranean termite, but it does not elicit phagostimulant activity.
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