Detailed Explanation of Key Techniques for Flower and Fruit Management in Mango Orchards

(1) Use of plant growth regulators:

When using plant growth regulators, the specified concentration, method of application and timing must be followed; plant growth regulators that have not been approved and registered for production by the state must not be used.

For plant growth regulators used to control shoots and promote flowering, the recommended concentration is ethephon 200-300 mg/L. For 15% paclobutrazol, apply 6-8 g per sq m to the soil under the tree canopy, or spray on leaves at 800-1000 mg/L.

For plant growth regulators used to preserve flowers and fruit, the recommended concentrations are: gibberellin 50-100 mg/L, naphthaleneacetic acid 40-50 mg/L.

When spraying plant growth regulators on leaves, neutral washing powder, surfactants, etc. should be added to improve efficacy.

Use of plant growth regulators should be stopped 1 month before harvest.

(2) Pruning and thinning of flowers and fruit:

For trees with a flowering rate of more than 80% of the terminal shoots, retain inflorescences on 70% of the terminal shoots, remove the remaining inflorescences from the base, and for larger inflorescences cut off 1/3-1/2 of the lateral flower branches from the base.

From after flower drop to the fruit development stage, cut off flower branches that do not bear fruit as well as branches and leaves that hinder fruit growth; cut off spring and summer shoots that emerge during the young fruit stage.

Within 15-30 days after flower drop, retain 2-4 fruits per inflorescence, and thin out deformed fruit, diseased and insect-damaged fruit, and excessively dense fruit to reduce the number of empty bags after bagging.