Winter tomato seedlings are heavy and disease resistant

Tomatoes are thermophilic vegetables. Winter nurseries require protection due to low temperatures, large temperature changes, high humidity, and poor ventilation.

The damping-off disease occurs mainly in the cotyledon stage. The base of the seedling stem is curled up into a thin line and suddenly falls down. When the humidity is high, white flocs grow on the ground near the diseased seedlings or diseased seedlings.

The freshly emerged seedlings and large seedlings can suffer damage, and the seedling base becomes brown. In the early stage of disease, the diseased seedlings were sunny and wizened and recovered at night. After the lesions expanded, they were atrophied and dried up. The whole plant died. The diseased part showed a light brown spider web fungus layer, and there was no obvious white floc, which could be separated from the cataplexy.

The roots of the roots of the roots of the young roots are rotted brown and new roots do not occur. The color of the aboveground leaves is light or wilting, the growth is slow, and the disease and seedlings are easy to pull up.

To prevent tomato disease at seedling stage, seedbed management should be strengthened to reduce the occurrence of environmental conditions conducive to disease occurrence, supplemented by pharmaceutical control. Before seeding, seed dressings were prepared with 0.3% to 0.4% of seeds containing 50% carbendazim WP or 35% metalaxyl seed dressing. When the seedlings are unearthed, they should be dislodged immediately, and the diseased plants should be pulled out immediately, and 50% carbendazim WP 800 to 1000 times, or 92% hymexazide WP 3000 times, or 25% metalaxyl can be used. Wet powder 800 times spray control. The application of hay ash to the seedlings after loosening the soil between the seedling rows also has certain disease control effects. Prevent blight, you can use 50% carbendazim WP 800 to 1000 times, or 70% SON Zinc WP 500 to 600 times, or 75% chlorothalonil WP 600 to 800 times spray. Found that there is a root phenomenon, the humidity should be reduced seedbed, raise the ground temperature, strengthen the air after the seedlings to strengthen the seedlings.

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