Zhonggang Li¹ , Weichang Wu²

1 Tropical Specialty Crops Research Center, Hainan Institute of Tropical Agricultural Resouces, Sanya, 572025, Hainan, China
2 Biotechnology Research Center, Cuixi Academy of Biotechnology, Zhuji, 311800, China
Author    Correspondence author
International Journal of Horticulture, 2026, Vol. 16, No. 2   doi: 10.5376/ijh.2026.16.0011
Received: 20 Feb., 2026    Accepted: 02 Apr., 2026    Published: 30 Apr., 2026

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Li Z.G., and Wu W.C., 2026, Influence of plant growth regulators on eggplant yield and uniformity, International Journal of Horticulture, 16(2): 122-134 (doi: 10.5376/ijh.2026.16.0011)

Eggplant production often faces problems such as unstable fruit set, yield fluctuation, and poor fruit uniformity. Plant growth regulators have therefore become an important regulatory tool for improving commercial production efficiency. This study discusses the effects of plant growth regulators on eggplant yield and uniformity, with particular emphasis on their roles in promoting flowering and fruit set, increasing fruit number per plant, improving single-fruit weight, and enhancing fruit shape and ripening synchrony. The results indicate that regulators such as GA3 and NAA can significantly improve yield components, whereas 6-BA, SA, and EBR are more effective in alleviating abiotic stress, maintaining growth continuity, and enhancing fruit uniformity. Overall, plant growth regulators can achieve coordinated improvements in yield increase, yield stability, and quality enhancement when applied at appropriate concentrations and developmental stages. This study provides a theoretical basis and practical reference for precision cultivation of eggplant, the scientific application of growth regulators, and the management of commercial production.

Eggplant; Plant growth regulators; Yield; fruit uniformity; Fruit set rate; Stress regulation