In recent years, the incidence of bacterial soft rot has gradually increased and it has become one of the major diseases that endanger the leek. Due to the loss of water blackness in the affected root system, Shouguang's local vegetable farmers also called it "black root disease."
Bacterial soft rot mainly harms the leaves, leaf sheaths, and roots of leeks. When the leaves are damaged, they lose their green color and become yellow. When the humidity is high, they cause water-soaked rot. Finally, the diseased leaves fall down, and the odor-laden mucus overflows. After the leaf sheath is damaged, it starts to rot from the base and decays, and gradually develops into the depth of the leaf sheath. When the leaf sheath is deep, the plants fall down. When the humidity is high, the foul odor of mucus overflows. When the humidity is low, the white lumps appear around the diseased plants; the roots are dark brown and rot after victimization.
The disease is a bacterial disease. The bacteria mainly live in the soil in winter. When the conditions are appropriate, they will invade the plants from the wounds caused by the underground pests, and then propagate and harm the whole plant. There are two incidence peaks every year, from late April to early May and early October, which coincides with the peak of earthworm occurrence. The more serious the earthworm damage, the more serious the bacterial soft rot occurs, indicating the disease. The occurrence of this is related to the occurrence of delirium.
For leek bacterial soft rot disease, we should adhere to the principle of "prevention first, comprehensive prevention and treatment". Because bacteria invade from the wound, early prevention and treatment of warts reduce wounds, it can do pest control. In late April and early October, 1.8% of avermectin EC or 40% phoxim EC can be used, respectively, plus 47% wetland powder or 46.1% copper hydroxide water dispersible granules. 800 times liquid ridge root irrigation, while using 10% cyromazine suspension 1000 to 1500 times liquid plus 3% methotrexate WP 400 to 500 times or 72% agricultural streptomycin sulfate WP 1000 times Liquid spray. After the harvest of winter leek, spraying with 0.3% tetramyristate 600 times liquid not only has bactericidal effect, but also can promote wound healing.
Bacterial soft rot mainly harms the leaves, leaf sheaths, and roots of leeks. When the leaves are damaged, they lose their green color and become yellow. When the humidity is high, they cause water-soaked rot. Finally, the diseased leaves fall down, and the odor-laden mucus overflows. After the leaf sheath is damaged, it starts to rot from the base and decays, and gradually develops into the depth of the leaf sheath. When the leaf sheath is deep, the plants fall down. When the humidity is high, the foul odor of mucus overflows. When the humidity is low, the white lumps appear around the diseased plants; the roots are dark brown and rot after victimization.
The disease is a bacterial disease. The bacteria mainly live in the soil in winter. When the conditions are appropriate, they will invade the plants from the wounds caused by the underground pests, and then propagate and harm the whole plant. There are two incidence peaks every year, from late April to early May and early October, which coincides with the peak of earthworm occurrence. The more serious the earthworm damage, the more serious the bacterial soft rot occurs, indicating the disease. The occurrence of this is related to the occurrence of delirium.
For leek bacterial soft rot disease, we should adhere to the principle of "prevention first, comprehensive prevention and treatment". Because bacteria invade from the wound, early prevention and treatment of warts reduce wounds, it can do pest control. In late April and early October, 1.8% of avermectin EC or 40% phoxim EC can be used, respectively, plus 47% wetland powder or 46.1% copper hydroxide water dispersible granules. 800 times liquid ridge root irrigation, while using 10% cyromazine suspension 1000 to 1500 times liquid plus 3% methotrexate WP 400 to 500 times or 72% agricultural streptomycin sulfate WP 1000 times Liquid spray. After the harvest of winter leek, spraying with 0.3% tetramyristate 600 times liquid not only has bactericidal effect, but also can promote wound healing.
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