How can we prevent fruit cracking?
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August is a crucial time for the growth and development of jujube fruits, as well as the peak season for pest and disease outbreaks. During the hot summer months, jujube trees transpire water and release heat simultaneously, which can lead to fruit cracking. To prevent this, it's essential to supply the tree with sufficient organic nutrients. Spraying the fruits with a sturdy solution and increasing the nutrient supply during this period helps support healthy fruit development. Applying a 500-times diluted new high-fat film sunscreen can help reduce water loss through transpiration, allowing the fruit to expand properly and enhancing its sugar content and color.
August is also the ripening period for jujubes, making it a high-risk time for diseases like anthrax, brown spot, and fruit-cut disease. Along with early preventive spraying and sterilization, any infected fruit should be removed immediately and deeply buried to prevent the spread of pathogens for the next season. This stage is also when date rust (leaf defoliation) begins. If yellow spots appear on the underside of the leaves, it's an early sign of rust infection. Prompt treatment with an 800-times diluted new high-fat film is necessary to control the spread.
During the defoliation control phase, it's important not to move between gardens or allow people to walk freely, as the bacteria thrive in humid conditions and can spread quickly through wind or human activity. A single oversight during this time could lead to severe damage. Therefore, strict management is required to avoid contamination and ensure effective disease control.
In mid to late August, the fruit crack prevention stage is critical. If no defoliation is observed, regular irrigation should begin once the fruits reach the white-mature stage. Ensuring adequate water supply helps increase the moisture content of the fruit, reducing the risk of cracking. The rainy season can also play a helpful role in minimizing fruit cracks.