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Investigating the effects of ethephon (2-chloroethylphosphonic acid) on Persian walnut fruit quality

Author

Listed:
  • Reza Khosravi Zanjani

    (Amirkabir Nanotechnology Research Institute (ANTR), Amirkabir University of Technology, Tehran, Iran)

  • Majid Abdouss

    (Department of Chemistry, Amirkabir University of Technology, Tehran, Iran)

  • Mohsen Mohammadi

    (Department of Agricultural Economics and Management, Payame Noor University (PNU), Tehran, Iran)

Abstract

The darkness of the kernel and the lack of simultaneous ripening of the mesocarp and endocarp are among the most significant challenges in Iranian walnut orchards. The mentioned problems appear more in areas with hot and humid summers. The research focused on the quality of the kernel in terms of colour and marketability, as well as the dry matter of the kernels. Additionally, the ease of mesocarp separation from endocarp was examined. Experimental trials were designed with 27 treatment combinations to address the mentioned issues using varying concentrations of 2-chloroethylphosphonic acid (ethephon) at different harvest dates. In this study, using 1 920 ppm of ethephon on August 22nd resulted in the best quality walnut kernels and mesocarp. Researchers in this project successfully achieved the highest quality of walnut kernels and nuts in a region where over 90% of the harvest consisted of dark-kernel walnuts.

Suggested Citation

  • Reza Khosravi Zanjani & Majid Abdouss & Mohsen Mohammadi, 2025. "Investigating the effects of ethephon (2-chloroethylphosphonic acid) on Persian walnut fruit quality," Horticultural Science, Czech Academy of Agricultural Sciences, vol. 52(3), pages 250-260.
    • Handle: RePEc:caa:jnlhor:v:52:y:2025:i:3:id:82-2023-hortsci
    DOI: 10.17221/82/2023-HORTSCI
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