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 high-temperature period, jujube tree leaves transpire and release heat simultaneously, which can lead to fruit cracking. To prevent this, it's essential to provide ample organic nutrients to the trees, spray the fruits and branches, and ensure sufficient nutrition for fruit development. Spraying a 500-times diluted new high-fat film sunscreen can help reduce water loss through transpiration, allowing the jujubes to expand normally and improve their color and sugar content.
August is also the ripening period for jujubes, during which anthrax, brown spot, and fruit-cut disease are more likely to occur. In addition to applying preventive sprays and sterilizing agents in advance, any infected plants should be removed immediately and deeply buried to prevent pathogens from surviving and causing damage in the following season. This month also marks the beginning of date rust, which causes leaf defoliation. If yellow spots appear on the underside of the leaves, it's a sign of date rust infection. A 800-times diluted new high-fat film should be applied promptly.
During the control of defoliation, it's important not to move between gardens or allow people to walk freely between them. The bacteria that cause defoliation thrive in humid conditions with suitable temperatures, and such activities can accelerate their spread. Wind and human movement can act as carriers, spreading the disease further. Therefore, even small mistakes during prevention and control can lead to serious consequences.
In mid to late August, it's also a critical time for preventing fruit cracking. If no defoliation issues are present in the jujube orchard, regular irrigation should begin once the fruits reach the white-mature stage. Ensuring timely water supply helps increase the moisture content of the fruits and reduces the risk of cracking. Additionally, the rainy season can naturally help minimize cracking. (China Plant Protection Network: Wei Linfei)
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