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 pests and diseases. During the hot summer months, jujube trees lose moisture through their leaves, which can lead to fruit cracking. To prevent this, it's essential to provide the tree with sufficient organic nutrients. Spraying the fruits with a sturdy solution and increasing the nutrient supply during this stage will help the fruits develop properly. Applying a 500-times diluted new high-fat film sunscreen can reduce water loss through transpiration, ensuring the fruit expands normally and develops good color and sugar content.
August is also the ripening period for jujubes, and this is when anthracnose, brown spot, and fruit-cut disease are most likely to occur. It’s important to apply preventive sprays and sterilizing agents in advance. If any infected fruits are found, they should be removed immediately and deeply buried to prevent the spread of pathogens for the next season. Additionally, August marks the beginning of date rust, which causes leaf defoliation. 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 vital to avoid moving between gardens or allowing people to walk freely through them. The bacteria that cause defoliation thrive in humid conditions, and excessive moisture and temperature can accelerate their reproduction and spread. Wind and human activity can further contribute to the transmission of these pathogens. A single mistake in management can lead to severe damage, so strict precautions must be taken.
In mid to late August, it's still a critical period for preventing fruit cracking. If no defoliation has occurred in the orchard, regular irrigation should begin once the fruits reach the white maturity stage. Ensuring consistent water supply helps increase the water content of the fruits and reduces the risk of cracking. The rainy season can naturally aid in minimizing cracks, making it an ideal time to maintain proper moisture levels in the orchard.