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Influence of soil pH, rainfall, dosage, and application timing of herbicide Merlin 750 WG (isoxaflutole) on phytotoxicity level in maize (Zea mays L.)

Author

Listed:
  • J. Soukup

    (Czech University of Agriculture in Prague, Czech Republic)

  • M. Jursík

    (Czech University of Agriculture in Prague, Czech Republic)

  • P. Hamouz

    (Czech University of Agriculture in Prague, Czech Republic)

  • J. Holec

    (Czech University of Agriculture in Prague, Czech Republic)

  • J. Krupka

    (Czech University of Agriculture in Prague, Czech Republic)

Abstract

Pot trials and field studies were carried out to describe the influence of soil pH and rainfall on the phytotoxic effect of the herbicide Merlin 750 WG (isoxaflutole) in maize. Symptoms as bleaching, and root and shoot weight reduction in early growth of maize were found. In pot trials, a statistically significant crop injury in early growth of maize was found only at the herbicide dose of 100 and 130 g/ha followed by 30 mm precipitation directly after herbicide application in soils with pH 6.5 and 7.2. Bleaching and significant weight reduction of maize up to growth stage BBCH 13 were observed in field trials at treatments with early post-emergence application of Merlin and 20 mm precipitations. Bleaching symptoms recovered up to BBCH 19. Significant differences were found in maize shoot weight and cob yield between treatments with and without watering (20 mm irrigation), and between pre- and post-emergence application of Merlin under field conditions. No significant differences were found between herbicide doses tested.

Suggested Citation

  • J. Soukup & M. Jursík & P. Hamouz & J. Holec & J. Krupka, 2004. "Influence of soil pH, rainfall, dosage, and application timing of herbicide Merlin 750 WG (isoxaflutole) on phytotoxicity level in maize (Zea mays L.)," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 50(2), pages 88-94.
    • Handle: RePEc:caa:jnlpse:v:50:y:2004:i:2:id:3687-pse
    DOI: 10.17221/3687-PSE
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