Cowpea root rot and red root disease are common problems that farmers face, often caused by factors such as root diseases, salt damage, various pathogens, nematode infestations, and more. Many growers lack the knowledge to effectively prevent and manage these issues. Today, **China Pesticide Network** shares some practical tips to help you protect your cowpea crops from root-related problems.
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**Preventive Measures:**
Cowpeas have a natural ability to fix nitrogen, so it's important to use a base fertilizer that is rich in organic matter and biological nutrients, with low nitrogen content. Applying root micro-fertilizers combined with root irrigation can stimulate the absorption and release of nitrogen, phosphorus, potassium, and trace elements in the soil. This helps improve the energy for fruit development and enhances the overall quality of the crop. These practices strengthen the root system and increase the plant’s resistance to diseases.
**Early Management:**
During the early growth stage, it’s recommended to water with small amounts of water and avoid applying top dressings before pod formation. Once pods begin to form, apply a high-potassium fruit-enhancing fertilizer. Then, spray a vegetable fruit strengthening agent to improve pollen fertilization, increase fruit set, and promote uniform fruit development. This leads to fewer deformed fruits, no empty shells, and better yield and quality.
**Control Methods:**
After the cowpea seedlings emerge, it's advised to spray a new high-fat film. This helps reduce soil moisture evaporation, prevents excessive transpiration from the seedlings, and creates a barrier against pests and diseases. It also shortens the seedling adaptation period and helps them adjust quickly to the new environment. Mix 25ml of powder cream with 0.5g of Bi-protection in 15kg of water and apply it once every 7–10 days. This treatment effectively controls diseases and kills nematodes in the rhizosphere, preventing red root disease and ensuring healthy cowpea growth.
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