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- W2014578989 abstract "Ethephon (2-chloroethylphosphonic acid), which generates ethylene, stimulated the germination of pre-conditioned seeds of Striga hermonthica when it was added to the alkaline Gezira clay soil at concentrations of 2.5 to 30 mg kg−1. As little as 5 min contact with treated soil was enough to stimulate germination. Ethephon in soil did not cause germination of unconditioned seeds for periods of up to 12 days and also had an adverse effect on seed germination when such seeds were given a second ethephon exposure after a storage period which was adequate, in untreated soil, to give the necessary pre-conditioning. Ethephon activity persisted in air-dry soil but declined over a 14 day period in moist soil. In the field ethephon at 0.6 to 4.8 kg ha−1 decreased the number of Striga shoots and increased sorghum height and flowering. Facteurs influençant l'activite de l'ethephon (acide 2-chloroethyl phosphonique) stimulant de la germination de graines de Striga hermonthica (Del.) Benth. L'Ethephon (acide 2-chloroethyl phosphonique), générateur d'éthylène, stimule la germination de graines conditionnées de Striga hermonthica lors qu'il est ajoutéà de l'argile basique provenant de Gezira à des concentrations de 2.5 à 30 mg kg−1. Un contact de 5 minutes avec le sol traité suffit pour stimuler la germination. L'Ethephon dans le sol ne provoque pas pendant au moins 12 jours la germination de graines si celles-ci ne sont pas conditionnées et a même un effect contraire si les graines sont soumises à un 2ème traitement à l'Ethephon après une période de stockage qui, dans un sol non traité, correspond au conditionnement nécessaire. L'activité de l'Ethephon persiste dans un sol séchéà l'air mais disparaît après 14 jours dans un sol humide. Au champ, l'Ethephon à des doses variant entre 0.6 et 4.8 kg ha−1, provoque une diminution du nombre de pousses de Striga et permet un meilleur développement et une meilleure floraison du sorgho. Faktoren, die die Aktivität von Ethephon (2-Chloräthanphosphonsäure) bei der Stimulierung der Samenkeimung von Striga hermonthica (Del.) Benth. beeinflussen Der äthylengenerator Ethephon (2-Chloräthanphosphonsäure) stimulierte bei Dosierungen von 2.5–30 mg/kg Boden die Keimung konditionierte Samen von Striga hermonthica im alkalischen Gezira-Tonboden. Bereits eine Kontaktzeit von 5 min. mit dem behandelten Boden reichte für eine Keimstimulierung aus. Ethephon im Boden löste bei unkonditionierten Samen bis zu 12 Tage keine Keimung aus. In diesem Fall wirkte sich eine zweite Behandlung mit Ethephon negativ auf die Keimung aus, wenn die Samen zuvor in unbehandeltem Boden entsprechend konditioniert worden waren. Ethephon blieb im lufttrockenen Boden aktiv; im feuchten Boden nahm die Aktivität nach 14 Tagen ab. Im Feld führten Ethephongaben von 0.6–4.8 kg/ha zu einer Abnahme von Striga-Sprossen; bei Sorghum wurdendie Pflanzenhöhe und die Blüte gefördert." @default.
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- W2014578989 date "1983-06-01" @default.
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- W2014578989 title "Factors affecting the activity of ethephon in stimulating seed germination of Striga hermonthica (Del.) Benth." @default.
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- W2014578989 doi "https://doi.org/10.1111/j.1365-3180.1983.tb00530.x" @default.
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