The distinction between mites and viral diseases is generally parasitic on the back of the leaves of vegetables. The leaves of the young leaves are damaged, the leaves become smaller and the color is thicker, the texture becomes harder, thick and brittle, and the plants grow poorly. When the virus disease is harmful, the leaf margin of the damaged young leaves is generally rolled up, showing a deformity, the leaves are lighter, and the veins are brighter.
Control: After confirming that the vegetables are damaged by mites, you can use 73% of Kejit emulsifiable concentrate 400~500mg/L, 5% of dead gram milk 667~1000mg/L, 0.9% of 扈 from 螨克 soluble liquid 250~ 333 mg / liter solution spray control. After confirming that it is a viral disease, it can be used on the basis of disease control (such as aphids, whitefly, etc.), using 20% ​​of virus A wettable powder 1000 mg / liter plus carapace 3333 mg / liter, 0.5% of plant disease Ling emulsion 1000 mg / liter plus Kang Debao phytonutrients 1000 ~ 1667 mg / liter solution spray control.
Identification of nematodes and bacterial wilt and blight The bacterial wilt, blight and nematodes can cause the infected vegetable plants to wilting, but the first two are infectious diseases. After the plants are damaged, the vascular bundles gradually become brown, and the nucleus is wilted at the early stage of the damage. It will return to normal in the morning and evening, and will continue to languish in the later period. The diseased stem is longitudinally cut and placed in a clear glass containing clear water. If the mucus overflows, it is a bacterial wilt. If there is no mucus overflow and the lower leaves of the plant turn yellow, it is wilt. In the early stage of nematode damage, the aboveground plants are poorly grown, the leaves are smaller than the leaves of normal plants, and the roots are reduced. Some nematodes can form "beaded" tumors on the fibrous roots; some nematodes are at the junction of the main roots and lateral roots. Cortical foraging causes damage to the cortical tissue.
Prevention and control: Vegetables with serious wilt disease such as cucumber and watermelon can be grafted with black seed pumpkin and vegetable gourd for prevention and treatment. After the occurrence of bacterial wilt, on the basis of reducing the humidity in the field and avoiding the flooding of large water, 77% of the WP can be killed or 25% of the chloroprednisolone WP 1667~2500 mg/L solution is applied. 200 grams of medicine. Nematodes can be controlled with 10% anti-line spirit (green collecting treasure).
Control: After confirming that the vegetables are damaged by mites, you can use 73% of Kejit emulsifiable concentrate 400~500mg/L, 5% of dead gram milk 667~1000mg/L, 0.9% of 扈 from 螨克 soluble liquid 250~ 333 mg / liter solution spray control. After confirming that it is a viral disease, it can be used on the basis of disease control (such as aphids, whitefly, etc.), using 20% ​​of virus A wettable powder 1000 mg / liter plus carapace 3333 mg / liter, 0.5% of plant disease Ling emulsion 1000 mg / liter plus Kang Debao phytonutrients 1000 ~ 1667 mg / liter solution spray control.
Identification of nematodes and bacterial wilt and blight The bacterial wilt, blight and nematodes can cause the infected vegetable plants to wilting, but the first two are infectious diseases. After the plants are damaged, the vascular bundles gradually become brown, and the nucleus is wilted at the early stage of the damage. It will return to normal in the morning and evening, and will continue to languish in the later period. The diseased stem is longitudinally cut and placed in a clear glass containing clear water. If the mucus overflows, it is a bacterial wilt. If there is no mucus overflow and the lower leaves of the plant turn yellow, it is wilt. In the early stage of nematode damage, the aboveground plants are poorly grown, the leaves are smaller than the leaves of normal plants, and the roots are reduced. Some nematodes can form "beaded" tumors on the fibrous roots; some nematodes are at the junction of the main roots and lateral roots. Cortical foraging causes damage to the cortical tissue.
Prevention and control: Vegetables with serious wilt disease such as cucumber and watermelon can be grafted with black seed pumpkin and vegetable gourd for prevention and treatment. After the occurrence of bacterial wilt, on the basis of reducing the humidity in the field and avoiding the flooding of large water, 77% of the WP can be killed or 25% of the chloroprednisolone WP 1667~2500 mg/L solution is applied. 200 grams of medicine. Nematodes can be controlled with 10% anti-line spirit (green collecting treasure).
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