Abstract
Field experiment was conducted to evaluate the efficiency of Aldicarb and Giberellic acid singly and in combination for controllingTylenchulus semipenetrans nematode, infectingCitrus sinensis var.Balady, in relation to its growth and yield Plant hormone, Giberellic acid and nematicide, Aldicarb and their combination significantly suppressedT. semipenetrans population in both soil and roots of Balady orange one and two months post application, and increased its growth and yield than that of control. The combination of Aldicarb and Giberellic acid proved good control of citrus nematode and caused subsequent increase in the growth and yield of orange tress more than the application of these chemicals alone. Yield of citrus per tree increased by up to 18.4, 17.8 and 43.6% over untreated control for treated trees with Aldicarb, Giberellic acid and their combination, respectively.
The hatchability ofT. semipenetrans eggs was highly suppressed by Aldicarb and its combination with Giberellic acid. On the contrary, Giberellic acid alone did not affect the egg hatching.
Zusammenfassung
Freilandversuche zur Bekämpfung des NematodenT. semipenetrans mit dem Pflanzenhormon Giberellinsäure und dem Nematizid Aldicarb einzeln und kombiniert führten in allen drei Fällen zur Verminderung der Nematodenpopulation und zur Steigerung des Citrus-Wachstums und der Ernte. Dabei hatte die Kombination der beiden Wirkstoffe eine größere Wirkung als die Teile allein. Die Zunahme der Citrus-Ernte betrug 18,4, 17,8 und 43,6% nach Anwendung von Aldicarb, Giberellinsäure und beide Wirkstoffe kombiniert. Die Schlüpffähigkeit derT. semipenetrans-Eier wurde durch Aldicarb und dessen Kombination mit Giberellinsäure stark vermindert. Giberellinsäure allein zeigte dagegen keine Wirkung auf das Eischlüpfen.
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Osman, G.Y., Salem, F.M. Response of tylenchulus semipenetrans to plant hormone, Giberellic acid and nematicide, Aldicarb singly and in combination. Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 67, 94–96 (1994). https://doi.org/10.1007/BF01904697
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DOI: https://doi.org/10.1007/BF01904697