Abstract
The aim of this study was to test the effect of various concentrations of abamectin on the reduction of early root penetration of three nematode species and on plant growth, when applied as a seed treatment on maize, cotton and sugar beet. The study revealed that penetration of Pratylenchus zeae was reduced more than 80% in maize at a dose of 1.0 mg a.i. seed−1. The number of galls caused by Meloidogyne incognita race 3 in cotton was also reduced more than 80% with 0.1 mg a.i. seed−1. Penetration of Heterodera schachtii in sugar beets was reduced over 60% when seeds were treated at a concentration of 0.3 mg a.i. seed−1. Root length, as well as shoot and root weights in all plants treated with abamectin were not significantly different from controls. Our investigation determined that using abamectin as a seed treatment is an effective way of reducing early root infestation of the three different nematodes at low concentrations in a variety of crops and does not negatively affect plant growth.
Zusammenfassung
Ziel der vorliegenden Arbeit war es, den Einfluss verschiedener zur Saatgutbehandlung eingesetzter Abamectin-Konzentrationen auf Befall von Mais, Baumwolle und Zuckerrübe mit pflanzenparasitären Nematodenarten zu untersuchen sowie mögliche Nebenwirkung auf das Pflanzenwachstum zu ermitteln. Die Untersuchungen zeigten, dass bei einer Saat-gutbehandlung mit Abamectin mit einer Konzentration von 1.0 mg a.i. seed−1 die Eindringung von Pratylenchus zeae in Mais über 80% reduziert wurde. Im Falle von Baumwollsaat-gut, welches mit einer Abamectin-Konzentration von 0.1 mg a.i. seed−1 behandelt wurde, betrug die Wirksamkeit gegen-über Meloidogyne incognita (Rasse 3) ebenfalls 80%, bei Zuckerrübensaatgut, behandelt mit einer Abamectin-Konzen-tration von 0.3 mg a.i. seed−1, wurde eine Wirksamkeit gegen-über Heterodera schachtii von 60% festgestellt. Wurzellänge als auch die Spross- bzw. Wurzelgewichte von Pflanzen, deren Saatgut mit Abamectin behandelt wurde, unterschieden sich nicht signifikant von denen unbehandelter Pflanzen. Die Untersuchungen verdeutlichten, dass eine Saatgutbehand-lung mit Abamectin für die praktische Anwendung geeignet ist. Eine hohe Wirksamkeit in verschiedenen Kulturen ohne negative Auswirkungen auf das Pflanzenwachstum wurde festgestellt.
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Cabrera, J.A., Kiewnick, S., Grimm, C. et al. Efficacy of abamectin seed treatment on Pratylenchus zeae, Meloidogyne incognita and Heterodera schachtii. J Plant Dis Prot 116, 124–128 (2009). https://doi.org/10.1007/BF03356298
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DOI: https://doi.org/10.1007/BF03356298