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1. Gibberellins (GA₃/Gibberellic Acid) Flowering Promotion: Induces flowering outside the natural flowering period and increases the flowering rate. Fruit Enlargement and Weight Increase: Spray after pollination to promote cell elongation, increasing single fruit weight by 15%–30%. Seedless Fruit: Induces parthenocarpy (for self-fertile varieties). Usage: Flowering Promotion: Spray branches with 50–100 ppm before budding. Fruit Enlargement: Spray fruit 1–2 times with 50–200 ppm 10–15 days after pollination. 2. Cytokinins (6-BA, Chlorpyrifos, Thiidianone) 6-BA (Benzylaminopurine) Promotes flower bud differentiation, increases flower quantity and uniformity. Reduces fruit drop during fruit set. Usage: Spray flower buds with 10–50 ppm at the initial flowering stage. Chlorpyrifos (CPPU) Powerful fruit enlargement, maintains green scales, and increases marketability. Usage: 50–200 ppm 13 days after pollination. 1. Fruit Spray with Diluted Solution: Thiadiazon (for fruit enlargement, increased sugar content, and improved firmness) Note: High concentrations may delay coloring and increase the risk of deformed fruit. 2. Auxiliary Plants (NAA, IBA) NAA (Naphthaleneacetic Acid) For flower and fruit retention, prevent physiological fruit drop. Usage: 10-20 ppm spray on fruit clusters 3-5 days after flowering. IBA (Indolebutyric Acid) For rooting cuttings: 500-1000 ppm, immerse the base for 15 seconds-1 minute. 3. Brassinolide (BR) Enhances resistance to stress (high temperature, low temperature, drought), preserves flowers and fruits, and improves photosynthesis and nutrient absorption. Usage: 0.01-0.05 ppm spray on the entire plant during flowering, young fruit stage, and fruit enlargement stage. 4. Ethephon For ripening, uniform coloring, and earlier market availability. Note: High concentrations may cause soft fruit, fruit drop, and premature scale senescence. 5. Growth Control Agents (e.g., growth regulators) Flower Suppression (Fluoride) Fluoride: Controls excessive vegetative growth and promotes nutrient transfer to flowers and fruits