Summer cultivation of tomatoes Wang Yi prevention of physiological diseases

Tomato cultivation during the summer typically begins in late May, with seedlings transplanted into the field by mid-June. The fruit is harvested in mid to late August. However, due to the high temperatures and rainy conditions during this period, tomato plants are prone to physiological disorders, which can hinder their normal growth and make them more susceptible to pest infestations. Through research and analysis, the main causes of these physiological issues include excessive fertilizer use, leading to high soil salinity and poor root development. High temperatures and dry surface conditions further limit root activity, making it difficult for plants to convert nitrogen into usable forms. This results in curled and thickened lower leaves, stunted growth, and even leaf drying. Another major factor is an imbalance in nutrient levels. Overuse of nitrogen and phosphorus can lead to deficiencies in essential micronutrients like potassium, calcium, and boron. These elements compete with each other, reducing their absorption efficiency and causing problems in nutrient transport and plant metabolism. To manage these issues, several control methods can be applied: 1. Follow the principle of using basal fertilizer as the primary source, with top-dressing as a supplement. Increasing the amount of basal fertilizer significantly improves plant health and resilience. Field studies show that applying 75–80% of the total fertilization requirement as basal fertilizer yields excellent results. 2. Implement a balanced fertilization strategy by incorporating organic matter and ensuring proper ratios of nitrogen, phosphorus, and potassium. Apply trace element fertilizers when necessary, avoid overuse of nitrogen, and use humic acid-based fertilizers that improve soil structure, enhance buffering capacity, and promote better root development. 3. Ensure timely and adequate watering. During the summer growing season, when temperatures are high and rainfall is frequent, it's important to maintain a balanced water supply. Avoid waterlogging or prolonged drought by watering regularly and keeping rows well-drained. 4. Supplement with essential micronutrients. If calcium deficiency occurs, spray the leaves with a 1% superphosphate solution. For boron deficiency, apply a foliar spray of 0.2–0.5% borax solution. 5. Control pests such as aphids, whiteflies, and thrips to boost the plant’s natural resistance. Use insecticides like 3% acetamiprid diluted 750 times or 10% imidacloprid wettable powder diluted 1500 times for effective pest management. By following these practices, growers can significantly reduce the occurrence of physiological disorders and ensure healthier, more productive tomato crops throughout the summer season.

Snap Button Electrodes

Snap Button Electrodes,Tens Unit Pads,Tens Machine Pads,Electrodes For Back Pain

Suzhou Letai Medical Technology Co.,Ltd. , https://www.letaihealthcare.com