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Effect of adjuvants on the dissipation, efficacy and selectivity of three different pre-emergent sunflower herbicides

Author

Listed:
  • Jiří ANDR
  • Martin KOČÁREK

    (Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Miroslav JURSÍK

    (Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Veronika FENDRYCHOVÁ

    (Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Lukáš TICHÝ

    (Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

The aim of this work was to compare the efficacy, selectivity to sunflower and dissipation of three pre-emergent herbicides. Flurochloridone, linuron and oxyfluorfen were applied individually and each herbicide was also applied in a tank mix with two different adjuvants (a silicon-based adjuvant and paraffin oil). Small-plot field trials were carried out with sunflower in Central Bohemia in 2012 and 2015. Around 25-35% of the active ingredients in the applied herbicides were detected in soil 60 days after application in both years, except for oxyfluorfen in 2012, whose residual concentration was 60%. The tested soil adjuvants did not affect the dissipation of any of the tested herbicide in soil in either experimental year. Oxyfluorfen exhibited the highest mobility and caused the greatest degree of sunflower injury (18%), especially in the year with high rainfall shortly after application. None of the tested adjuvants significantly affected sunflower injury by any tested herbicide. The efficacy of flurochloridone and linuron on Fallopia convolvulus was strongly affected by weather conditions shortly after application. The efficacy of oxyfluorfen was around 85% and was not affected by weather conditions. The effect of adjuvant on herbicide efficacy was positive only in dry conditions, where the efficacy of flurochloridone on F. convolvulus was positively affected by the silicon-based adjuvant.

Suggested Citation

  • Jiří ANDR & Martin KOČÁREK & Miroslav JURSÍK & Veronika FENDRYCHOVÁ & Lukáš TICHÝ, 2017. "Effect of adjuvants on the dissipation, efficacy and selectivity of three different pre-emergent sunflower herbicides," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 63(9), pages 409-415.
    • Handle: RePEc:caa:jnlpse:v:63:y:2017:i:9:id:365-2017-pse
    DOI: 10.17221/365/2017-PSE
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    References listed on IDEAS

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    1. M. Jursík & M. Kočárek & K. Hamouzová & J. Soukup & V. Venclová, 2013. "Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 59(4), pages 175-182.
    2. Miroslav JURSÍK & Josef SOUKUP & Josef HOLEC & Jiří ANDR & Kateřina HAMOUZOVÁ, 2015. "Efficacy and selectivity of pre-emergent sunflower herbicides under different soil moisture conditions," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 51(4), pages 214-222.
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    Cited by:

    1. Miroslav Jursík & Martin Kočárek & Michaela Kolářová & Lukáš Tichý, 2020. "Effect of different soil and weather conditions on efficacy, selectivity and dissipation of herbicides in sunflower," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 66(9), pages 468-476.

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