Effect of the afterglows of low pressure Ar/N2-O2 surface-wave microwave discharges on barley and maize seeds

Csaba Szőke, Zoltán Nagy, Krisztián Gierczik, András Székely, Tamás Spitkól, Zsuzsanna T. Zsuboril, Gábor Galiba, Csaba L. Marton, K. Kutasi

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Abstract

Non-infected and infected cereal crops, respectively, are treated in the afterglow of Ar/N2-O2 surface-wave microwave discharges at 2–8 mbar pressure. It is shown, that the germination and vigour of non-infected seeds are not significantly effected, when barley is treated max 120 s at 2 mbar and maize 240 s at 4 mbar. On the other hand, seeds can be disinfected from the germination inhibitors Fusarium graminearum and Fusarium verticillioides. The most efficient treatment, which also increases the germination of infected seeds above 80%, for barley is the 3 min Ar-20%O2 afterglow at 4 mbar, while for maize the 4 min Ar-20%O2 + 2 min N2-2%O2 at 8 mbar. The high NO content mixtures and the heating of seed surface by the recombination of O and N-atoms inhibit barley germination.

Original languageEnglish
Article number1700138
JournalPlasma Processes and Polymers
Volume15
Issue number2
DOIs
Publication statusPublished - Feb 1 2018

Keywords

  • afterglow plasma processes
  • fusarium
  • microwave discharges
  • modeling
  • vigour test

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

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    Szőke, C., Nagy, Z., Gierczik, K., Székely, A., Spitkól, T., Zsuboril, Z. T., Galiba, G., Marton, C. L., & Kutasi, K. (2018). Effect of the afterglows of low pressure Ar/N2-O2 surface-wave microwave discharges on barley and maize seeds. Plasma Processes and Polymers, 15(2), [1700138]. https://doi.org/10.1002/ppap.201700138