To ensure healthy eggplant growth and high-quality harvest, proper care should be taken before, during, and after the fruit expansion period. Before the fruit starts to grow, it's essential to water, fertilize, and prune appropriately while maintaining controlled irrigation. Once the fruit begins to expand, consistent watering is necessary, ideally in the early morning to reduce evaporation and prevent moisture stress. Throughout the growing season, it's important to remove any diseased, old, or yellowing leaves, as well as damaged fruits, to maintain plant health. If any plants show signs of disease, they should be removed immediately to prevent the spread of infection. When pruning or performing other operations, always wash your hands with a concentrated soapy solution to avoid spreading viruses. Avoid watering the plants just before the fruit starts to develop, as this can lead to blossom end rot or other issues. When the fruit reaches about 3 to 4 centimeters in length, apply the first top dressing: 15 kg of urea per mu and 7 kg of potassium sulfate mixed into the soil. Water carefully and avoid overwatering at this stage. The second top dressing should be applied at the beginning of fruit expansion, using another 15 kg of urea per mu. Fertilization intervals should be around 10 to 15 days. In addition, take measures to protect the fruit, such as using phytohormone sprays to improve fruit set and increase yield. In terms of pest and disease management, follow a "prevention-first" approach with integrated control methods. Use insecticidal lamps, black lights, or dual-wave lights to attract and trap pests. Rotate pesticides regularly and strictly adhere to safety intervals to minimize residue. For example, use 50% Speed Kolin powder diluted 1500 times for gray mold, applying it three times every day. For blight, use 64% Zineb (antivirus) powder diluted 500 times, applying it three times every three days. For Verticillium wilt and blight, use 50% Carbendazim WP diluted 500 times, applying it twice every five days. For aphids, use 22% Dichlorvos smoke agent at 400 g/mu, applying it five times every five days. For thrips, use 10% Imidacloprid WP at 1000–1500 ml, applying it twice daily. Avoid using highly toxic or long-residue pesticides. If pesticides are used during the growing season, conduct a pesticide residue test one to two days before harvesting. Harvesting should be based on visual cues: when the dark and light zigzag stripes on the fruit are narrow and closely spaced, it's ready for picking. Early harvesting may reduce yield, while late harvesting can lower quality and affect fruit development. It's best to harvest when the plant is vigorous and the fruit has reached its optimal size. Choose to harvest in the afternoon or evening, as morning branches are more brittle and less hydrated, while midday temperatures can cause stress. To avoid damaging the plant, use scissors to cut the fruit from the stem rather than pulling it off.

API

what is API?

High-purity plant monomer refers to one or more single chemical components with specific biological activity or pharmacological effects extracted from plants, and its purity is usually high, meaning that the content of the component in the extract reaches a certain percentage, and the content of other impurities or irrelevant components is low.

These plant monomers are usually secondary metabolites of plants, such as flavonoids (flavonoids), alkaloids (alkaloids), terpenoids (terpenoids), phenolics (phenolics), etc., which play a variety of physiological functions in plants such as defense, signal transduction, and antioxidant. Due to their pharmacological activity, high-purity plant monomers are often used in pharmaceuticals, health products, cosmetics and other biotechnology products.

For example, Naringenin is a high-purity plant monomer extracted from citrus plants with antioxidant and anti-inflammatory activities; Corosolic acid is a high-purity active monomer extracted from loquat leaves, which is considered to be effective in treating type 2 diabetes and obesity.

Extraction and preparation of high-purity plant monomers usually require a complex separation and purification process, including extraction, column chromatography, crystallization, recrystallization and other steps to ensure the purity and activity of the final product. These processes may be required by specialized biotechnology companies.

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