Latin name: Pseudomonas panzcz (Elliott) stepp Damage symptoms: Rice can be affected from the seedling stage to the panicle stage, but it mainly occurs in the field stage. Symptoms appear when germinating the first true leaves from rice seeds. The main features are the appearance of water-stained long strips on the leaves and leaf sheaths of the seedlings, which develops along the mid-ribs, with lesions ranging from yellow-brown to dark brown; pathogens invade leaves without causing heart rot and severe odor. In adult plants, lesions mostly occur at the junction of the leaves and leaf sheaths, and then develop up and down the mid-ribs, becoming dark-brown long-striped spots. Finally, the diseased part rots, smells, and the leaves die. The diseased plants were generally higher than the healthy plants and had more ineffective tillers; the spikes and necks of diseased ears were elongated, the twigs were light brown, and the deformities were curved and the grains were not true. Incidence characteristics: The occurrence of this disease is closely related to seedling flooding. Where low-lying rice fields are flooded or heavy rains occur day after day, the fields affected by floods are susceptible to disease. Generally, 3 to 8 days after flooding, rice seedlings begin to develop symptoms. High-temperature and high-humidity disease incidence, with dwarf varieties, the development of bright green field weight. Control methods: 1. Rectify the drainage and irrigation system to avoid submergence of flooded paddy fields and reasonable irrigation to prevent deep irrigation. 2. Disinfection of rice seeds (the treatment method is the same as that of rice bacterial blight), strengthen the management of field management, avoid string irrigation and prevent flooding. 3, the incidence of cropland, can be sprayed Chuanhua 018 or Ye Qing double, method with rice bacterial blight. 4. When the flood water recedes, it should be immediately drained, lime and ash should be spread to control the spread of diseases and promote the regeneration of rice roots. When the new roots of rice occur, the nitrogen fertilizer can be quickly applied to promote the recovery and growth of rice plants to reduce losses. Common Pharmacy: Chuanhua 018 Ye Qingshuang
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