What are the main types of rice virus disease? What are the symptoms?
What are the main types of rice virus disease? What are the symptoms? In the process of planting rice, because of improper management or timely prevention and control of pests and diseases, etc., various viral diseases have occurred in rice, which has seriously affected rice growth. Therefore, today, Xiaobian talks about the types of rice virus diseases and Symptoms. There are four main types of rice virus diseases, as follows.
The first type: the diseased plant is short atrophy, the tiller is increased, the leaves are dark green, and the leaves and leaf sheaths have dotted dots parallel to the white veins and the veins. This is the symptom of the common dwarf disease. The virus is caused by the black tail. Leafhopper spreads with poison.
The second type: The second type is similar to the ordinary dwarf disease. The difference is that the wax and white are produced on the leaves and sheaths, and later become black-brown strip-like protrusions, that is, black-streaked dwarf disease. The disease is transmitted by the scorpion fly.
The third type: the diseased plants are short atrophy, the plant type is relatively loose, and the leaves are flat. In the early stage of the disease, the diseased leaves are yellow and green, and in the later stage, the whole leaves are orange-yellow and curled downward by the tip of the leaves. All the leaves of the early onset rice show symptoms, and the late onset, the symptoms are only on the upper new leaves, which is the symptoms of yellow dwarf disease. The disease is transmitted by the black-tailed spider mites.
The fourth type: the diseased plants are shortly atrophied, the leaf shape of rice is small, the leaf quality is soft, the leaves are yellow, and the tillers are increased. Some rice plants also have high-level tillers with small brooms, and many aerial roots are common in high tillers. This disease is verticillium. Verticillium wilt is also transmitted by black-tailed spider mites.
The Laodelphax striatellus and the black-tailed spider mites are the culprit in the spread of various dwarf diseases. Preventing the rice in the seedling stage from contacting these pests or directly killing these pests is the fundamental way to control various viral diseases in rice. At the time, Huinong.com suggested that rice contiguous planting and reduction of flower arrangement fields could effectively reduce the spread of viral diseases among different mouthwashes, and also help rule the rule.
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