What are the causes of flower and fruit drop in jujube trees?

The number of flowers and fruits dropped by jujube trees accounts for about 98% of the total flower count. Flowers that are not pollinated or fertilized wither and drop one week after blooming, and a second peak appears after full bloom. The amount of fruit drop and the time when fruit drop ends vary by cultivar. The main cause of physiological fruit drop in jujube is malnutrition. This is because the flowering period coincides with the period of vigorous growth of branches and leaves, creating competition between reproductive organs and nutrient utilization. Secondly, the short lifespan of pollen and adverse weather during the flowering period are also factors causing massive flower and fruit drop. The impact of pests and diseases can also cause flower and fruit drop.