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Xia Wei Caiqiao Management
In summer, high temperatures and heavy rains can lead to reduced nutrient accumulation in amaranth. The plant experiences higher consumption rates and increased fiber content in its leaf tissues, making it less suitable for harvesting at this time. Instead of continued harvesting, focus should be placed on strengthening plant cultivation to ensure a strong foundation for the upcoming autumn leek season.
One important practice is to remove the flowering buds early. If left unchecked, these buds will consume significant nutrients, which could hinder plant growth, tillering, and overall nutrient storage, ultimately affecting annual yield. Timely removal of the flower stalks helps maintain the plant’s energy for better development.
Weeding is also essential during the hot and rainy summer months. Weeds thrive under such conditions and can significantly impact the growth of leeks. Regular weeding ensures that the plants have enough space and nutrients to grow properly.
Disease prevention is another critical aspect. Amaranth is particularly susceptible to blight during hot weather, especially after heavy rain. Prolonged exposure to heat can create hot spots near the ground, which may lead to severe damage or even death of the entire plant. To prevent this, proper drainage and flood control measures should be implemented. After heavy rains, using well water to cool the soil surface can help reduce temperature stress. Additionally, applying a 50% carbendazim solution diluted at 500 times can effectively prevent disease outbreaks.
Pest control is equally important. In summer, cockroach infestations tend to be more severe. A recommended treatment method involves using a 50% phoxim solution diluted at 800 times, which can be applied by slowly watering it into the ditches. Alternatively, phoxim granules can be sprinkled during leek cutting and soil fertilization to manage pest populations effectively.
By following these practices—free cutting, weeding, disease prevention, and pest control—farmers can ensure healthier plant growth and better yields. These methods are crucial for maintaining the quality and productivity of amaranth throughout the growing season.
Wang Deming, Vegetable Bureau, Xiajin County, Shandong Province.