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Bio-efficacité des extraits végétaux de Calotropis gigantea contre H. armigera

Bio-efficacité des extraits végétaux de Calotropis gigantea contre H. armigera


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About the Book

La présente étude intitulée "Études sur la bio-efficacité des extraits végétaux de Calotropis gigantea R. Br. contre le foreur de gousses de gramme, Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera)" a été réalisée en 2005-2007 dans le département d'entomologie de la faculté d'agriculture de l'université d'Annamalai, à Annamalainagar. Certains des résultats importants de l'étude sont présentés ci-dessous. Parmi les cinq extraits aqueux de C. gigantea (feuille, fleur, tige, racine et plante entière) testés sur les oeufs de H. armigera, l'extrait de feuille à une concentration de 10 % s'est révélé très efficace, provoquant une inhibition maximale de 90 % de l'éclosion des oeufs lorsqu'il était testé sur des oeufs âgés de 24 à 48 h. Les oeufs âgés de 48 à 72 h ont été testés à une concentration de 10 %. Les oeufs de 48 à 72 heures étaient moins sensibles, même lorsqu'ils étaient traités avec une dose plus élevée. Lors de l'extraction par solvant, l'extrait de feuille a montré l'inhibition maximale (100,00 %) de l'éclosion des oeufs, tandis que l'extrait de fleur a enregistré une inhibition de 90,00 % pour les oeufs de 24 à 48 heures à une concentration plus élevée de 10 %. Au fur et à mesure que l'âge de l'oeuf augmente, l'efficacité de l'extrait diminue. L'extrait aqueux de feuilles a provoqué la mortalité maximale (83,33 %) du deuxième stade, tandis que les autres extraits ont montré un faible pourcentage de mortalité.


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Product Details
  • ISBN-13: 9786207361953
  • Publisher: KS Omniscriptum Publishing
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Weight: 195 gr
  • ISBN-10: 6207361954
  • Publisher Date: 08 Apr 2024
  • Height: 229 mm
  • No of Pages: 124
  • Spine Width: 7 mm
  • Width: 152 mm


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