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Anti-gonadotropic hormones from the goatweed, Ageratum conyzoïdes

Published online by Cambridge University Press:  19 September 2011

I. Fagoonee  and
G. Umrit
I. Fagoonee
Affiliation:
School of Agriculture, University of Mauritius, Réduit, Mauritius
G. Umrit
Affiliation:
School of Agriculture, University of Mauritius, Réduit, Mauritius
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Abstract

The goatweed, Ageratum conyzoïdes L., contains the same chromenes, precocenes 1 and 2, as the bedding plant, A. houstonianum. A crude lipid extract from the goatweed exerts ovicidal action and induces sterility after topical treatment of both young last instar larvae (L6) and females of Dysdercus flavidus Sign, at emergence by inhibiting ovarian development. The chromenes survived metabolism for at least 12 days. The action of the two chromenes in the crude extract is synergistic.

Résumé

L'herbe bouc Ageratum conyzoïdes L. contient les mêmes substances antiallatotropes, soit precocènes 1 et 2, qu'A. houstonianum. Un extrait brut lipidique à partir de la plante d'A. conyzoïdes a une action ovicidale; des jeunes larves du dernier stade (L6) aussi bien que des femelles de Dysdercus flavidus Sign, traitées à l'émergence topiquement produisent des adultes stériles par suite d'une inhibition du développement ovarien. Ces substances actives survivraient le métabolisme à l'intérieur de l'insecte pour une période d'au moins 12 jours. Les deux chromènes agiraient en synergie dans l'extrait brut.

Keywords

GoatweedA. conyzoïdesprecocenes 1 and 2ovicideanti-gonadotropichormonesbedding plantL'herbe boucA. conyzoïdesprecocènes 1 et 2ovicideantigonadotropeshormones
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 1 , Issue 4 , December 1981 , pp. 373 - 376
Copyright
Copyright © ICIPE 1981

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References

REFERENCES

Bowers, W. A. (1976) Discovery of insect antiallatotropins. In The Juvenile Hormones (Ed. by Gilbert, L. I.), pp. 394–408. Plenum Press, New York.CrossRefGoogle ScholarPubMed
Bowers, W. S. and Martinez-Pardo, R. (1977) Antiallatotropins: inhibition of corpus allatum development. Science 197, 1369–1371.CrossRefGoogle ScholarPubMed
Bowers, W. S., Ohta, T., Cleere, J. S. and Marsella, P. A. (1976) Discovery of insect antijuvenile hormones in plants. Science 193, 542–547.CrossRefGoogle ScholarPubMed
Fagoonee, I. (1980) The potential of natural products in crop protection in Mauritius. In Proceedings, National Agricultural Production Conference, 10–15 December 1979, University of Mauritius, Réduit, Mauritius (Ed. by Peerally, A. P., Fagoonee, I. and Unmole, H.), pp. 201–217.Google Scholar
Kelly, T. J. and Fuchs, M. S. (1978) Precocene is not a specific antigonadotropic agent in adult female Aedes aegypti. Physiol. Ent. 3, 297–301.CrossRefGoogle Scholar
Mackauer, M., Nair, K. K. and Unnithan, G. C. (1979) Effect of precocene II on alate production in the pea aphid, Acyrthosiphon pisum. Can. J. Zool. 57, 856–859.CrossRefGoogle Scholar
Pener, M. P., Orshan, L. and De Wilde, J. (1978). Precocene II causes atrophy of corpora allata in Locusta migratoria. Nature 272, 350–353.CrossRefGoogle Scholar
Pratt, G. E. and Bowers, W. S. (1977) Precocene II inhibits juvenile hormone biosynthesis by cockroach corpora allata in vitro. Nature 265, 548–550.CrossRefGoogle ScholarPubMed
Rembold, H., Czoppelt, C. and Sharma, G. K. (1979) Precocene II is no antijuvenile hormone in the honeybee, Apis mellifera. Z. Naturf. 34c, 1261–1263.CrossRefGoogle Scholar
Unnithan, G. C. and Nair, K. K. (1979) The influence of corpus allatum activity on the susceptibility of Oncopeltus fasciatus to precocene. Ann. ent. Soc. Am. 72, 38–40.CrossRefGoogle Scholar
Unnithan, G. C., Nair, K. K. and Bowers, W. S. (1977) Precocene-induced degeneration of the corpus allatum of adult females of the bug Oncopeltus fasciatus. J. Insect Physiol. 23, 1081–1094.CrossRefGoogle Scholar
Unnithan, G. C., Nair, K. K. and Koorman, C. J. (1978) Effects of precocene II and juvenile hormone III on the activity of neurosecretory A-cells in Oncopeltus fasciatus. Experientia 34, 411–412.CrossRefGoogle Scholar