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<p>Weed interference is one of the most critical factors limiting sugar beet productivity, especially under tropical conditions. Identifying the critical period of weed control (CPWC) can optimize weed management and reduce yield loss. A field experiment was conducted to investigate the performance of tropical sugar beet as influenced by weed interference period and assess the CPWC in 2024 at Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh. Twelve distinct weed interference periods were investigated along with maintaining complete weed free and unweeded for whole growing periods. The experimental results showed that weed interference periods significantly influenced the growth, yield and quality of tropical sugar beet. Longer durations of weed interference reduced root length, root girth, shoot yield and root yield of sugar beet. Conversely, extended weed-free periods increased these yield components. Season long unweeded plots experienced approximately 94% yield loss compared to season long weed-free plots. CPWC was found between 133 and 1121 growing degree of days (GDD) equivalent to 6–74&#xa0;days after emergence (DAE) based on 5% acceptable yield loss. In can be concluded that establishing and maintaining a weed-free environment around the first ten weeks after emergence of sugar beet is crucial to overcome yield loss at 5% threshold level. Weed control cost can also be minimized by optimizing the timing of weed management strategies. These findings are based on specific regional conditions; thus, broader environmental research would enhance their applicability.</p>

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Determination of Critical Period of Weed Control in Tropical Sugar Beet: First Step to Formulate Sustainable Weed Management Strategy

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • Anjon Mallick,
  • Mahfuza Begum,
  • Sabuj Chandra Roy,
  • Md. Parvez Anwar,
  • Md. Harun Rashid,
  • Swapan Kumar Paul

摘要

Weed interference is one of the most critical factors limiting sugar beet productivity, especially under tropical conditions. Identifying the critical period of weed control (CPWC) can optimize weed management and reduce yield loss. A field experiment was conducted to investigate the performance of tropical sugar beet as influenced by weed interference period and assess the CPWC in 2024 at Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh. Twelve distinct weed interference periods were investigated along with maintaining complete weed free and unweeded for whole growing periods. The experimental results showed that weed interference periods significantly influenced the growth, yield and quality of tropical sugar beet. Longer durations of weed interference reduced root length, root girth, shoot yield and root yield of sugar beet. Conversely, extended weed-free periods increased these yield components. Season long unweeded plots experienced approximately 94% yield loss compared to season long weed-free plots. CPWC was found between 133 and 1121 growing degree of days (GDD) equivalent to 6–74 days after emergence (DAE) based on 5% acceptable yield loss. In can be concluded that establishing and maintaining a weed-free environment around the first ten weeks after emergence of sugar beet is crucial to overcome yield loss at 5% threshold level. Weed control cost can also be minimized by optimizing the timing of weed management strategies. These findings are based on specific regional conditions; thus, broader environmental research would enhance their applicability.