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Crop Density and Sowing Timing Effect on Tan Spot Occurrence in Spring Wheat

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  • Agnė Lukošiūtė-Stasiukonienė

    (Department of Plant Pathology and Protection, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Instituto al. 1, Akademija, LT-58344 Kėdainiai distr., Lithuania)

  • Mohammad Almogdad

    (Department of Plant Pathology and Protection, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Instituto al. 1, Akademija, LT-58344 Kėdainiai distr., Lithuania)

  • Roma Semaškienė

    (Department of Plant Pathology and Protection, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Instituto al. 1, Akademija, LT-58344 Kėdainiai distr., Lithuania)

  • Viktorija Mačiulytė

    (Institute of Geosciences, Vilnius University, LT-03225 Vilnius, Lithuania)

Abstract

Tan spot ( Pyrenophora tritici-repentis ) is presenting a persistent challenge to the plant health and yield of all wheat-growing regions. This research is focused on tan spot disease management in spring wheat when planted at three distinct times and with three different seeding rates without the use of fungicides. Across all years, higher seed rates (500 and 600 seeds per m 2 ) generally resulted in lower tan spot intensity compared to the lower seed rate (400 seeds per m 2 ). Significant differences in tan spot intensity were observed across seed rates at all sowing times. In 2021, the percentage of the AUDPC was significantly higher in the late sowing time (324.58%), with about a 2-fold difference compared with the early (167.48%) and optimal sowing time (191.80%). This suggests that delayed sowing significantly exacerbates disease occurrence. The combined effect of sowing time and year on the AUDPC was notably significant. The AUDPC of the tan spot in all seed rates was the highest in the late sowing time plots in comparison to the ideal and initial planting dates plots. Our results demonstrate how important seed rate and sowing timing are in determining the degree of tan spot in spring wheat. Growing crop methods may be improved by taking these elements into account to better control tan spots. More agricultural methods and environmental aspects should be investigated in future studies to create all-encompassing tan spot control plans.

Suggested Citation

  • Agnė Lukošiūtė-Stasiukonienė & Mohammad Almogdad & Roma Semaškienė & Viktorija Mačiulytė, 2024. "Crop Density and Sowing Timing Effect on Tan Spot Occurrence in Spring Wheat," Agriculture, MDPI, vol. 14(8), pages 1-13, August.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:8:p:1284-:d:1449536
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    References listed on IDEAS

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    1. Vesna Krnjaja & Violeta Mandić & Zorica Bijelić & Slavica Stanković & Ana Obradović & Violeta Caro Petrović & Marija Gogić, 2022. "Influence of Sowing Time on Fusarium and Fumonisin Contamination of Maize Grains and Yield Component Traits," Agriculture, MDPI, vol. 12(7), pages 1-11, July.
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