Recently, the author visited several farmers in Wulian and Liaocheng, Shandong, and found that cowpea root rot in greenhouses is a serious issue. In some cases, entire crops have been lost due to this disease. The problem isn't limited to cowpeas alone; it also affects kidney beans, causing significant damage. The causes of the disease include continuous cropping without proper soil treatment, overuse or improper use of nitrogen fertilizers, and neglecting microbial fertilizers. Additionally, unscientific sowing methods and overly dense planting contribute to the problem.
To effectively prevent cowpea root rot, several measures are recommended. First, crop rotation combined with microbial inoculation is essential. It's best to rotate cowpeas with crops like Cabbage or onions for at least two years. If rotation isn’t possible, after harvesting cowpeas, when seedlings reach 5–10 cm in height, applying 3 kg of compound microbial fertilizer per 100 mu can help. This method has proven very effective. Since many farmers grow cowpeas intercropped, it’s not practical to apply soil treatment agents widely. Therefore, using microbial fertilizers directly on the roots is a more feasible and proactive approach.
The compound microbial fertilizer developed by the Soil and Fertilizer Research Institute of Shandong Academy of Agricultural Sciences and Shandong Shenglong Bio-engineering Co., Ltd. contains five beneficial bacterial strains. These bacteria improve soil quality, enhance the growing environment, and promote root development, ultimately reducing the risk of root rot.
Second, using nutrient-rich seedlings and transplanting through scientific methods can significantly reduce the incidence of root rot. Studies show that this method can lower the disease rate by up to 75%. Farmers can prepare their own nutrient soil by mixing 5 kg of "Golden Micro" microbial agent with 1 kg of potassium sulfate compound fertilizer or diammonium per 100 kg of dry fine soil. The ratio is 100:5:1. After planting, irrigation with 100 times diluted compound microbial fertilizer is recommended. Before planting, the microbial agent can also be applied directly into the planting holes—50 grams per hole or 10 grams of "Fugen."
Third, chemical control is another option. Applying a 400-fold dilution of bacterial agent to the roots or using a 20% collaborative ammonia bronze water agent at a 400-fold dilution to spray the stem base or irrigate the roots can help manage the disease. Apply every 7–10 days, repeating 3–4 times. Each application should use about 200–250 ml per plant. Combining these strategies can greatly improve the health of cowpea crops and ensure better yields.
Dried Carrot,Air Dried Carrot,Carrot Powder,Dried Carrot Flakes,Dried Carrot Slice
Jiangsu Tiankang Food Co., Ltd. , https://www.tiankangfood.com