Tomato withered pathological and physiological causes. Pathological mainly include bacterial wilt, blight, root rot, bacterial myeloid necrosis, and other diseases.
Among them, bacterial wilt, blight, and root rot are caused by lesions in the roots. Bacterial wilt is a bacterial disease. The disease usually occurs at the flowering stage and the initial stage of the disease, and the color of the susceptible plants becomes light and wilting. In the early days, the animals wilted during the day and recovered in the evening. After repeated days, the wilt increased and finally the whole plant died. If the disease stem cross-section inspection, slightly squeezed, white bacteria overflow. Fusarium wilt is a fungal disease. The diseased wilt strains begin to turn yellow from the lower leaves. After the disease develops, the upper leaves are also dry, and sometimes only the leaves on one side of the disease plants turn yellow. Cut the stalk of the diseased plant, and the catheter became brown. Root rot damages stem base or roots. The tip of the plant leaves wilted, and the wilting leaflets discolored and dehydrated from the leaf margin. Excavation of the diseased plants showed that the roots became brown, and the lateral roots and fine roots rotted and fell off, and the main roots were corked.
Bacterial myeloid necrosis, the disease mainly damage the stem caused by some branches withered, a serious death of the whole plant.
One of the physiological characteristics is the large temperature change, especially after the continuous exposure of the shade; the second is the roots; the third is the burning of roots. There will be a larger area of ​​general physiology.
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