Spraying rare earth foliar can significantly enhance the sugar content of fruits by 0.6 degrees and improve yield. The recommended method involves applying a 0.05% solution of rare earth nitrate during the softening stage of the fruit. Focus on spraying the young leaves and the undersides of the leaves for maximum absorption. It is best to spray in the late afternoon on sunny days or on cloudy days to prevent rapid evaporation or wash-off due to rain. If it rains within 24 hours after application, re-spraying is necessary to maintain effectiveness.
When the fruit begins to soften and shows a slight purple tinge, it is an ideal time to apply the agent. This should be done one week before harvesting, ensuring uniform coverage. Apply the solution 150 to 300 times depending on the grape variety. This process helps increase glucose levels, enhances color development, and improves overall sweetness.
Hormone spraying is another effective technique that regulates phosphine and auxin levels. These hormones can raise the sugar content by 1 degree and 0.6 degrees respectively. The application should begin when the fruit starts to soften. Use either a phosphine solution or an auxin solution, focusing again on the young leaves and leaf backs. Ensure even and thorough coverage for optimal results.
In addition to these methods, proper irrigation and balanced fertilization are essential for maximizing the benefits of foliar sprays. Monitoring the weather conditions before and after spraying is crucial to avoid unnecessary loss of nutrients. Regular observation of the plant's response will help fine-tune the application schedule and ensure better crop quality. With consistent care and attention, farmers can achieve higher yields and improved fruit quality, making their produce more appealing in the market.
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