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DIE WIRKUNG VON EINIGEN PFLANZLICHEN SONDERSTOFFEN, INSBESONDERE VON ALKALOIDEN, AUF DIE ENTWICKLUNG DER LARVEN DES KARTOFFELKÄFERS ( LEPTINOTARSA DECEMLINEATA SAY)

1958; Wiley; Volume: 1; Issue: 3 Linguagem: Inglês

10.1111/j.1570-7458.1958.tb00025.x

1570-7458

Herbert Buhr, R. TOBALL, K. Schreiber,

Insect Pheromone Research and Control

Die Wirkung von 83 Alkaloiden, Saponinen und einigen weiteren Naturstoffen bzw. ihren Derivaten wurde bei Zwangsfütterungen auf die Larven des Kartoffelkäfers getestet. Die ermittelten Befunde werden tabellarisch wiedergegeben und kurz diskutiert. Summary Eighty three alkaloids, saponins and some other naturally occurring substances and their derivatives were tested for their effect on the larvae of the Colorado potato beetle ( L. decemlineata Say). Special attention was paid to the alkaloid‐glycosides of some Solanum and Lycopersicon species, to further Solanaceae ‐alkaloids, and to some sapogenins, related to the Solanum ‐alkaloid glycosides in their biogenesis, chemistry and larval activity. Whereas tomatin (for example) affected the larvae mainly by repellent action of the food, nicotin even in quite small concentrations had a pronounced toxic effect. It should be noted that physostigmin, colchicin, veratrin, aconitin, delphinin as well as cantharidin, quassiin and Picrotoxin, like nicotin, caused sudden death of the larvae soon after their ingestion. A comparable effect to tomatin was also observed among the investigated Solanum alkaloid‐glucosides with the tetraosides isolated from Sol. demissum and Sol. polyadenium. with the soladulcin mixture from Sol. dulcamara , similarly with a number of other alkaloids of very different origin and notably with the tested saponins and related substances. Further substances investigated, especially a number of Solanum glyco‐alkaloids (e.g., solacaulin) and other Solanaceae alkaloids (e.g., atropin), showed an intermediate effect on the larvae; others again (e.g., alpha‐solanin) had only a small or no influence on larval development.