August is a crucial time for the growth and development of jujube fruits, as well as the peak season for the spread of pests and diseases. During the hot summer months, jujube trees transpire and release heat, which can lead to fruit cracking. To prevent this, it's essential to provide the tree with sufficient organic nutrients. Spraying the fruits and branches with a 500-times diluted high-fat film sunscreen can help reduce water loss through transpiration, allowing the jujubes to expand properly and develop better color and sugar content.
In August, jujubes are also at their ripening stage, making it a high-risk period for diseases such as anthrax, brown spot, and fruit-cut disease. It’s important to apply preventive sprays and disinfectants in advance. If any infected fruits are detected, they should be removed immediately and buried deeply to prevent the pathogens from surviving and causing damage in the following season. Additionally, August marks the beginning of date rust, which causes leaf defoliation. If yellow spots appear on the underside of leaves, it's a sign of early infection. Immediate treatment with an 800-times diluted high-fat film is necessary to control the spread.
During the defoliation control period, it's crucial not to move between gardens or allow people to walk freely between them. The bacteria that cause defoliation thrive in humid conditions, and movement can accelerate their spread. Wind and human activity can act as carriers, so strict measures must be taken to avoid cross-contamination. Even a small mistake during this period can lead to severe consequences.
In mid to late August, it's also a critical time for preventing fruit cracking. If no signs of defoliation are present, regular irrigation should begin once the fruits reach the white maturity stage. Ensuring adequate water supply helps increase the moisture content of the jujubes, reducing the risk of cracking. Rainfall during this time can further help minimize cracking issues. (Source: China Plant Protection Network – Wei Linfei)
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