Chinese name: Wheat bush dwarf English name: Wheat rosette dwarf Chinese alias: wheat sitting slope, small old seedlings, wheat leaf disease, wheat bush flowers, ten diseases Latin scientific name: WRSV damage crops: wheat damage symptoms: winter wheat autumn seedlings two leaves Symptoms start to appear in the period, beginning with the leaves and stems, showing chlorosis between the veins or yellowing of the stems; then gradually expanding toward the tips of the leaves. In the light, intermittent, short, slender yellowish-white or yellowish stripes or yellow stripes appear between the veins; slightly heavier, the fringes are not confined by the veins, and 1-3 leaf veins whitish to chloroplast from the stem to the tip of the leaflet. Stripes, veins appear yellow, dwarfization is not significant, and spikelets can be partially extracted. In severe cases, the plants are short and the leaf color turns yellow, the new leaves cannot be stretched, and the needles are thin and thin, and the number of tillers increases, ranging from 20 to 30, without heading. Individuals also do not increase, but the roots are few and stubby and have brown necrosis. These diseased plants often die before winter. Disease characteristics: The main period of transmission of winter wheat is the autumn. In general, in the presence of toxic sources, the earlier the winter wheat sowing, the earlier the autumn seedlings are affected and the more serious the disease will be. According to the vaccination experiment, the resistance increased with the increase of the physiological age of the plant, and the incidence of the invaded plant was lighter after spring returning to spring. Therefore, the key to combating this disease is to control the early infection of autumn seedlings. In addition, the interplanting of wheat in winter wheat or cotton interplanting with winter wheat is more severe than that of uncropped flat wheat, and the more severe the disease is, the closer the grass is to the weeds in the ditch. This is because of the increase in the chance of contagious spread of the planthoppers. Control methods: 1 Agricultural control (1) Intercropping wheat and corn and cotton in heavily afflicted areas. (2) Before weeding wheat, weeds should be removed to reduce weeds and poisons. (3) Timely delay in sowing. 2. Drug control (1) Seed Dressing Refer to wheat seed dressing. (2) Qiu Miao prevention and treatment, with 10% of Yipeng Powder WP 250g per mu, or 25% of Suantui Wettable Powder 150g per mu, or 25% of Bupropion Wettable Powder per acre 25- 30 grams, add water and spray 50 kg. (3) In the early spring, another field spray was conducted on the insect wheat field. Common Pharmacy: Ye Yu San B
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