The symptoms and prevention of Banda blue blight
2019-09-04 08:03:47
Symptoms: The disease mainly occurs in the lower parts of the plant. At the early stage of the disease, the susceptible bulb appeared water stain-like lesions, and the lesion was light yellow. At the late stage of the disease, the lesions subsided, turning brown to dark brown, slightly elevated over the edge of the ulcer, and there was gelatinous pus on the lesion. Leaf base disease often produces red bulging spots. Leaf sheath infections appear dark brown water stains markings. The damage to the leaves is yellowing and withering. In a dry environment, the disease department rots and dies. In the wet condition, the diseased tissue softens and disappears, and only the fibers of the vascular bundle are finally left. At this time, the stem is easily broken.
Pathogen: The pathogen is Pseudomonas marginata (McCul-loch Stapp).
The law of onset: pathogenic bacteria remain in the soil together with the bulbs of the same disease, and in the case of a suitable environment, the infection spreads. Earthworms such as cockroaches and cockroaches can carry pathogens and increase their damage. Water and human gardening can also spread diseases. In case of high temperature, heavy rain, and high humidity, the onset is severe.
Prevention and control: 1 Reduce the source of infection: find diseased plants to eradicate the burned in time, and disinfect the adjacent soil. 2 to strengthen the cultivation and management: to avoid continuous work in the incidence area. The disease-free ball was selected and disinfected with 1000 times potassium permanganate solution. The bulbs to be harvested must be rigorously selected and eliminated. The use of plant ash and phosphate fertilizer as base fertilizer removes accumulated water in a timely manner.
Pathogen: The pathogen is Pseudomonas marginata (McCul-loch Stapp).
The law of onset: pathogenic bacteria remain in the soil together with the bulbs of the same disease, and in the case of a suitable environment, the infection spreads. Earthworms such as cockroaches and cockroaches can carry pathogens and increase their damage. Water and human gardening can also spread diseases. In case of high temperature, heavy rain, and high humidity, the onset is severe.
Prevention and control: 1 Reduce the source of infection: find diseased plants to eradicate the burned in time, and disinfect the adjacent soil. 2 to strengthen the cultivation and management: to avoid continuous work in the incidence area. The disease-free ball was selected and disinfected with 1000 times potassium permanganate solution. The bulbs to be harvested must be rigorously selected and eliminated. The use of plant ash and phosphate fertilizer as base fertilizer removes accumulated water in a timely manner.
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