Abstract
Crude ethanol extracts (CE) of leaves of 60 plant species belonging to 32 families and 52 genera were bioassayed for toxicity to adult Tribolium confusimi by spraying a 10% (w/v) concentrate under a Potter’s tower. CE of eight plants had none and three had some bioactivity; 36 CE killed from 13 to 40% of the beetles. Thirteen plant extracts inflicted between 53 and 100% mortality in the following order: Azadirachta indica (53%) < Eupatorium odorantum — Gliricida septum = Mimosa pudica (60%) < Annona reticulata = Hibiscus rosa sinensis (67%) < Cycloptis semicordata < Artocarpus altilis < Capsicum annum (90–97%) < Bontia daphnoides = Cuscuta americana = Dioscorea polygonoides = Nicotina tabacum (100%).
Résumé
Des extraits bruts d’éthanol provenant de feuilles de 60 espèces de plantes appartenant à 32 familles et à 52 genres ont été soumises à des analyses biologiques destinées à déterminer leur toxicité à des Tribolium confusum adultes au moyen de pulvérisations sous tour potters d’un concentré de 10% (poids sur volume).
Les extraits de 8 plantes n’ont montré aucune bioactivité, alors que 3 ont montré activité; 36 extraits ont tué de 13 à 40% des scarabées. 13 extraits ont infligé une mortalité de 53 à 100 %. L’orde des plantes bioactives est le suivant: Azadirachta indica (53%) < Eupatorium odorantum = Gliricida sepium = Mimosa pudica (60%) < Annona reticulata — Hibiscus rosasinensis (67%) < Cycloptis semicordata < Artocarpus altilis < Capsicum annum (90–97%) < Bontia daphnoides = Cuscuta americana = Dioscorea polygonoides = Nicotina tabacum (100%).
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Williams, L.A.D., Mansingh, A. Pesticidal Potentials of Tropical Plants—I. Insecticidal Activity in Leaf Extracts of Sixty Plants. Int J Trop Insect Sci 14, 697–700 (1993). https://doi.org/10.1017/S1742758400018142
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DOI: https://doi.org/10.1017/S1742758400018142