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Selectivity and efficacy of herbicides dimethachlor and pethoxamid in rocket crop

Author

Listed:
  • Ivana Doležalová

    (Department of Genetic Resources of Vegetables, Medicinal and Special Plants of the Crop Research Institute in Olomouc, Olomouc, Czech Republic)

  • Irena Petrželová

    (Department of Genetic Resources of Vegetables, Medicinal and Special Plants of the Crop Research Institute in Olomouc, Olomouc, Czech Republic)

  • Martin Duchoslav

    (Department of Botany, Faculty of Science, Palacký University, Olomouc, Czech Republic)

Abstract

Field experiments were conducted to evaluate the efficacy, selectivity and health harmlessness of four application rates of two pre-emergent herbicides (pethoxamid and dimethachlor) in the rocket [Eruca vesicaria (L.) Cavanilles)]. Pethoxamid was found to be less efficient on the total weed density (efficacy 86.0-93.3%) in comparison with the effect of dimethachlor (94.9-95.8%). Dimethachlor expressed an excellent efficacy on Echinochloa crus-galli (L.) P. Beauvois, Portulaca oleracea Linnaeus, Amaranthus retroflexus Linnaeus, Lamium purpureum Linnaeus, and Veronica persica Poiret from the lowest tested application rate (800 g/ha). Pethoxamid showed an excellent efficacy on E. crus-galli, Lamium purpureum, Lamium amplexicaule Linnaeus, V. persica, and P. oleracea. In higher application rates, pethoxamid controlled Chenopodium polyspermum Linnaeus and Chenopodium album Linnaeus. In contrast to mostly negative effects of dimethachlor, pethoxamid showed either no effects or positive ones on the rocket yield. Residues of both herbicides in the harvested product were always below a 'default limit', which is the baseline maximum residue level for food. The selectivity of pethoxamid at an application rate of 960 g/ha was good, herbicide residues in the rocket were not detected and the yield of the rocket increased.

Suggested Citation

  • Ivana Doležalová & Irena Petrželová & Martin Duchoslav, 2020. "Selectivity and efficacy of herbicides dimethachlor and pethoxamid in rocket crop," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 56(4), pages 305-316.
    • Handle: RePEc:caa:jnlpps:v:56:y:2020:i:4:id:93-2020-pps
    DOI: 10.17221/93/2020-PPS
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    References listed on IDEAS

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    1. Jaroslav ŠUK & Miroslav JURSÍK & Marie SUCHANOVÁ & Dana SCHUSTEROVÁ & Kateřina HAMOUZOVÁ, 2018. "Dynamics of herbicide degradation in cauliflower," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(11), pages 551-556.
    2. Christos A. Damalas & Ilias G. Eleftherohorinos, 2011. "Pesticide Exposure, Safety Issues, and Risk Assessment Indicators," IJERPH, MDPI, vol. 8(5), pages 1-18, May.
    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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