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Optimising Clearfield and ExpressSun sunflower technologies for Central European conditions

Author

Listed:
  • Miroslav Jursík
  • Veronika Fendrychová

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

  • Michaela Kolářová

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

  • Jiří Andr

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

  • Josef Soukup

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

Abstract

The efficacy and selectivity of herbicides and tank-mix combinations at different application terms in Clearfield and ExpressSun sunflowers were evaluated. Five-plot field trials (2011-2015) were carried out in Prague. The efficacy of tribenuron (TBM) was excellent and quite rapid on Chenopodium album. Its efficacy on other tested dicot weeds ranged around 90%, depending on weather conditions and growth stages of weeds. Echinochloa crus-galli was not controlled by TBM. The tank-mix combination of TBM + propaquizafop (PQF) caused sunflower injury when applied in a very cold growing period. Under dry conditions, PQF efficacy on E. crus-galli was strongly reduced. The split application of TBM, when PQF was used at the second application, was less negatively affected by herbicide antagonisms. Very good results were obtained on plots with pre-emergence treatment with dimethenamid and post-emergence with TBM. The efficacy of imazamox (IZM) on dicot weeds was strongly affected by growth stages of weed and weather conditions during application. Efficacy of IZM on E. crus-galli was increased by oil adjuvant, but this adjuvant reduced IZM selectivity. The best efficacy, selectivity, and Clearfield sunflower yield were on plots with the split application of IZM.

Suggested Citation

  • Miroslav Jursík & Veronika Fendrychová & Michaela Kolářová & Jiří Andr & Josef Soukup, 2017. "Optimising Clearfield and ExpressSun sunflower technologies for Central European conditions," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 53(4), pages 265-272.
    • Handle: RePEc:caa:jnlpps:v:53:y:2017:i:4:id:2-2017-pps
    DOI: 10.17221/2/2017-PPS
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    References listed on IDEAS

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    1. M. Jursík & J. Andr & J. Holec & J. Soukup, 2011. "Efficacy and selectivity of post-emergent application of flumioxazin and oxyfluorfen in sunflower," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(11), pages 532-539.
    2. 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.
    3. 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. Lukáš TICHÝ & Miroslav JURSÍK & Michaela KOLÁŘOVÁ & Václav HEJNÁK & Jiří ANDR & Jaroslava MARTINKOVÁ, 2018. "Sensitivity of sunflower cultivar PR63E82 to tribenuron and propaquizafop in different weather conditions," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(10), pages 479-483.

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