Abstract
—The already known benzoquinone, embelin (mixed with rapanone), and two new benzoquinones, myrsinone and myrsinaquinone, were isolated from the Myrsinaceae plant, Rapanea melanphloes (L), Mez. All the three compounds showed antifeedant activity when bioassayed on nymphs of the desert locust, Schistocerca gregaria (Forsk). They also inhibited growth of second-instar larvae of mosquito A edes aegypti at low doses, and had acute lethal effects at higher doses.
Résumé
—La bénzoquinone déjà connue, l’embéline (mélangée à la rapanone), et deux nouvelles bénzoquinones, la myrsinone et la myrsinaquinone, ont été isolées de la plante Myrsinaceae, Rapanea melanphloes (L.), Mez. Tous les trois composés ont montré une activité phagodéterrente dans des essais biologiques sur les nymphes du criquet du désert, Schistocerca migratoria (Forsk.). A faible doses ils ont aussi inhibé la croissance et à fortes doses Us ont produit des effets léthaux aigus pour le deuxième stade larvaire chez le moustique Aedes aegypti.
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Midiwo, J.O., Mwangi, R.W. & Ghebremeskel, Y. Insect Antifeedant, Growth-Inhibiting and Larvicidal Compounds from Rapanea melanphloes (Myrsinaceae). Int J Trop Insect Sci 16, 163–166 (1995). https://doi.org/10.1017/S1742758400017057
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DOI: https://doi.org/10.1017/S1742758400017057
Key Words
- Rapanea melanphloes
- Schistocerca gregaria
- Aedes aegypti
- embelin
- myrsinone
- myrsinaquinone
- benzoquinones
- antifeedants
- growth inhibitors
- larvicides