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Effects of Mepiquat Chloride and Chlormequat Chloride on the Growth and Fruit Quality of ‘Shine Muscat’ Grapevines

Author

Listed:
  • Dawei Cheng

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China
    These authors contributed equally to this work.)

  • Shasha He

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China
    These authors contributed equally to this work.)

  • Lan Li

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

  • Xiangyang Tong

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

  • Hong Gu

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

  • Xiaoxu Sun

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

  • Ming Li

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

  • Jinyong Chen

    (National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang 453500, China)

Abstract

Excessive shoot vigor in grapevines negatively impacts plant growth and fruit quality, necessitating the use of plant growth regulators (PGRs) for canopy management. This study investigated the effects of mepiquat chloride (MC) and chlormequat chloride (CCC) on shoot growth (including new shoot length, relative chlorophyll content, leaf area, etc.) and fruit quality in Vitis vinifera cv. ‘Shine Muscat’. Different concentrations of MC (100, 300, 500, 700 mg/L) and CCC (100, 300, 500, 700 mg/L) were applied via foliar spraying at multiple stages before flowering. The results demonstrated that both PGRs effectively suppressed shoot elongation, with CCC exhibiting superior inhibitory efficacy compared to MC. However, high concentration of either compound also restricted leaf and cluster development. Optimal treatments MC (500 mg/L) and CCC (100 mg/L) significantly enhanced berry size, soluble solids content (SSC), and solid–acid ratio while maintaining effective shoot control. For practical application, we recommend spraying MC (500 mg/L) or CCC (100 mg/L) during the new shoot growth, flower-cluster separation, and flowering stages of ‘Shine Muscat’ grapevines to improve the new shoot control effect and fruit quality.

Suggested Citation

  • Dawei Cheng & Shasha He & Lan Li & Xiangyang Tong & Hong Gu & Xiaoxu Sun & Ming Li & Jinyong Chen, 2025. "Effects of Mepiquat Chloride and Chlormequat Chloride on the Growth and Fruit Quality of ‘Shine Muscat’ Grapevines," Agriculture, MDPI, vol. 15(12), pages 1-13, June.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:12:p:1267-:d:1676941
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