It is generally believed that excessive growth of tree vigor, nutrient supply and demand contradiction, leading to fruit drop; weak tree vigor and malnutrition, leading to fruit drop; prolonged drought and sudden rain cause fruit drop; pest damage, soil compaction, and weakened root physiological functions can also cause fruit drop.
Preventive measures: First, pay attention to adjusting the tree vigor through various technical means (summer pruning, topping, spraying plant growth regulators); secondly, according to the development of the tree, timely carry out basic management under the tree-top dressing, watering, cultivating pine Soil provides a good root ecological environment for the growth and development of jujube trees; third, according to the occurrence of diseases and insects, following the plant protection principle of “prevention first, comprehensive controlâ€, spray insecticides and fungicides in advance to prevent pests; fourth, in jujube One month before the fruit matures normally, spray 40 mg/kg naphthalene acetic acid (first use a small amount of hot alkaline water to dilute the naphthalene acetic acid into mother liquor, then add water), spray once every 15 days, and spray twice.
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