Autumn greenhouse tomatoes entered the period of seedling management. The first thing that vegetable growers should pay attention to is the occurrence of stem rot and root rot in common diseases of tomatoes. Their symptoms are easily confused in recognition, so there are often errors in medication.
The symptom of stem-based rot is that the rhizome near the ground is water-soaked, the stem becomes brown, wilting, and dead, and the roots are good after the disease is removed. This is because of high temperature, high humidity, and flooding caused by flooding. This phenomenon is generally heavier in the vegetable fields cultivated in the flat. The ridge planting on the ground is slightly lighter.
Although the symptoms of root rot and stem-based rot occur in the roots of the seedlings, the pathogenesis of root rot is at the base of the underground roots, and the diseased seedlings are pulled out. The roots are black and rot, and the roots turn yellow. The occurrence of root rot is related to seed carrier and surface fertilization, and poor soil environment. The plots of planting and supplementing fertilizer with fertilizers are heavy.
In the control pesticides , the stem-based rot must be immersed in the seedling tray with 600 times 64% Jinlei liquid for 10 minutes before transplanting the tomato; 600 times of the Jinlei, Kefangling and other liquids can be used after transplanting. Irrigation plants. For the prevention of root rot, 3 kg of seeds can be treated with 2 ml of a suspension of 2.5% celsius for coating; after transplanting, the roots can be irrigated with 800 times liquid of Shigak or 600 times of methyl thiophanate.
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