Preventing Soft Rot in Chinese Cabbage
In recent years, the occurrence of soft rot disease in Chinese cabbage has become more severe due to factors such as improper variety selection, early sowing times, and high temperatures during the planting season. To address this issue, the author conducted a series of field trials in 2002, including variety testing, sowing date adjustments, and chemical control methods. These practices were later implemented in Daejeon in 2003, resulting in satisfactory outcomes. First, using disease-resistant varieties is crucial. New Chinese cabbage varieties that meet market demands—such as Beijing Xin 3 and Qiulv 75—are recommended. These varieties are not only resistant to diseases but also offer high quality and yield. Second, determining the optimal sowing period plays a key role in preventing soft rot. Based on the climate conditions in Wuqing District and the growth characteristics of Chinese cabbage, it is advisable to delay sowing. The ideal sowing time is around August 10th. The seeding rate should be about 0.3 kg per mu. Before sowing, seeds are treated with Fengling (200 g per 100 kg of seeds). The process involves soaking the seeds, then mixing the powder evenly and drying them before sowing. Third, proper fertilizer and water management is essential. It is best to plant Chinese cabbage in fields that have not been used for cruciferous crops in the past. Before planting, the soil should be deeply tilled to a depth of 30–40 cm. High-quality organic compost (1000–1500 kg per mu) is added, and raised beds are formed with a width of 50 cm and a height of 10–15 cm. For soil disinfection, 2 kg of carbendazim or enemy pine is applied per mu, and 50 kg of compound fertilizer is placed in the furrows. After sowing, the plants are managed according to the principle of "three waters, three seedlings, and five waters." A density of 2200–2600 plants per mu is recommended. About 10–15 days after sowing, appropriate thinning is done. At the rosette and balsamic stages, 20–25 kg of compound fertilizer is applied during watering. During the early ball stage, the soil is kept slightly dry, while it should be moist during the full ball stage. Watering should stop one week before harvest to reduce the risk of disease. Fourth, a comprehensive approach to pest and disease control is necessary. Viral diseases and downy mildew can worsen the development of soft rot, so their prevention and treatment must be prioritized. 1. In the early stages of viral disease, spraying Di-Dongbao once every 7–10 days, for 2–3 times, can effectively manage the infection. 2. Soft rot bacteria should be removed promptly during the heart-wounding period. When soft rot appears, apply 50% DT fungicide at a rate of 10 g per mu mixed with 25–30 kg of water. Alternatively, use an agricultural streptomycin solution diluted 3000–4000 times, or spray with Bactec. Repeat the treatment every 7–10 days for 2–3 times. If pests like aphids or cabbage caterpillars are present, spray with a 500–600 times solution of 1.1% dish soap. Contributor: Tianjin Plant Protection and Quarantine StationFrozen Squid Fillet,Frozen Squid Strip Frozen Seafood,Frozen Squid Strip High Quality Seafood,Frozen Giant Squid Fillets Seafood
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