Bacterial root rot is a common plant disease that affects the roots and lower parts of the stem. Affected plants show symptoms such as easily pulled-up hearts and leaves, yellowing at the base of the stem, and dark, foul-smelling roots. Severely infected leaves become wilted, curled, and eventually turn yellow, resembling the "dry heart" damage caused by locusts. When diseased plants are pulled from the soil, they often come out with the mud attached. Squeezing the stems or roots by hand may result in the oozing of milky, turbid fluid with a distinct odor, which is a clear sign of bacterial infection.
To prevent and control bacterial root rot, several effective measures can be taken:
1. Apply potassium fertilizer to strengthen the plant's resistance. Potassium helps improve the overall health and resilience of the plant against diseases.
2. After harvesting, ensure the field is properly drained and kept moist. Maintaining proper moisture levels can help reduce the spread of bacteria in the soil.
3. Use chemical treatments for effective control. For example, apply 72 grams of streptomycin sulfate soluble powder per acre mixed with 15 liters of water for spraying. Alternatively, use 100 grams of Longkei (a 20% thiazole copper suspension agent produced by Zhejiang Longwan Chemical Factory) per mu for foliar application. These treatments can significantly reduce the occurrence and severity of bacterial root rot when applied regularly and correctly.
It’s important to monitor the crops regularly and take action at the first sign of infection. Early intervention is key to preventing the disease from spreading and causing serious damage to the crop yield.
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