Evaluation of the sensitivity of edible onion (Allium cepa L.) to sulfosulfuron soil residue in Zanjan

Document Type : Research Article

Authors

1 Department of Plant Production & Genetics, Faculty of Agriculture, University of Zanjan, Iran

2 Department of Agricultural Sciences and Food Industries, Science and Research Branch, Islamic Azad University, Tehran, Iran.

10.22034/ijws.2025.368371.1482

Abstract

Sulfonylurea herbicides' soil persistence can harm subsequent crops in rotation. A factorial experiment (randomized complete block design, three replications) studied sulfosulfuron's soil residual effects on onion growth and yield during the 2019 growing season at the Research Farm of University of Zanjan. Treatments comprised sulfosulfuron doses (0, 25, 50, 75, 100, 125, and 150 g ha⁻¹) and weeding (weeded/unweeded). Measured parameters included weed density and dry weight, crop plant height, density, leaf count, stem fresh/ dry weight, and onion total yield. Results showed weed dry weight decreased sharply at doses >75 g ha⁻¹, with a 43% reduction at 150 g ha⁻¹. Onion leaf count and stem dry weight declined significantly at ≥25 g ha⁻¹ under both weeding regimes, while tuber yield decreased 87% at 150 g ha⁻¹ versus control. Since low doses (25–50 g ha⁻¹) effectively suppress weeds, their application of lower dosages in summer crops like tomato could balance weed control and minimize residual impacts on subsequent onion cultivation.

Keywords

Iranian Journal of Weed Science
Volume 20, Issue 2
June 2025
Pages 53-69

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History

  • Receive Date: 20 January 2025
  • Revise Date: 04 May 2025
  • Accept Date: 27 July 2025
  • First Publish Date: 27 July 2025
  • Publish Date: 21 December 2024

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