Strawberry topdressing promotes early onset

Strawberries require a significant amount of nutrients to grow and produce high-quality fruit. On average, for every acre of land producing 750 kg of strawberries, the plants need about 10 kg of nitrogen, 2.5 kg of phosphorus, and 10 kg of potassium annually. To meet these needs, proper fertilization is essential throughout the growing season. One effective method is topdressing, which helps promote early growth. After applying organic fertilizer and once the soil has thawed, the first topdressing should be done before the strawberry plants start to germinate. A recommended application is 10 kg of urea or 15 kg of compound fertilizer per mu (approximately 667 square meters). It's important to dissolve the fertilizer in water before applying it to avoid damaging the roots. In mid-April, during the flowering stage, another topdressing should be applied with a focus on phosphorus and potassium—around 10 kg of compound fertilizer per mu. During this time, foliar spraying with a 0.2% solution of potassium dihydrogen phosphate can be done two to three times, spaced about 10 days apart. Additionally, shallow watering should be done before the buds appear, and light watering during the fruit expansion period. Avoid flooding the plants, and after watering, perform light cultivation to maintain soil health. Thinning flower buds is also an important practice. While all flowers on the inflorescence may bloom, not all will develop into marketable fruits. Late blooms often result in small or unmarketable fruit, wasting valuable nutrients. Therefore, it’s best to remove weak buds after the plant starts to flower, leaving only 10–15 strong buds per plant. This allows the plant to concentrate its energy on producing larger, earlier fruits. Additionally, since strawberries are short plants, their fruits tend to touch the ground, leading to dirt and rot. To prevent this, spread straw or hay around the base of the plants after flowering. This keeps the fruit off the ground and reduces disease risk. Once the fruit is harvested, the straw can be removed. Pest and disease control is crucial for healthy strawberry production. In early spring, if pests like ground beetles, wireworms, or cockroaches are found, you can apply insecticides such as 90% trichlorfon crystals at 200 g per acre or 50% phoxim emulsion at 200–300 g per acre. Watering the roots with 1–1.5 kg of the solution can help control these pests. Alternatively, mixing 50 g of trichlorfon with 1–1.5 kg of water and 2.5–3 kg of cooked wheat bran, or spreading the mixture over chopped fresh grass, can also be effective. For gray mold, spraying with 50% Nongli Ling WP diluted 800 times or 50% Keiling WP diluted 1000 times is recommended. To prevent brown spot, use 20% agricultural anti-120 diluted 200 times or 50% thiophanate-methyl at 500–1000 times. For powdery mildew, applications of 1.25% nitrile emulsifiable concentrate diluted 2000 times or 20% powder rusting wettable powder diluted 1000 times can be used. The most effective way to prevent viral diseases is to use virus-free seedlings and control aphids that transmit the virus. At the first sign of infection, spray with 1.5% phytopathogenic emulsion diluted 1000 times or 83 anti-agent diluted 100 times. Cockroaches can be controlled with 50% anti-Pu Wei WP diluted 2000 times or 10% imidacloprid WP diluted 1500–2000 times. By following these practices, growers can ensure healthier plants, better yields, and higher quality strawberries.

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