In recent years, with the increase in the area of ​​spring sown corn, corn dwarf mosaic virus disease has also been increasing, and has become the main disease of spring sown corn. First, symptom recognition: Maize dwarf mosaic virus disease can be felt during the whole growth period of corn, especially in the seedling stage. In the three-leaf period of corn, the disease is present. Initially, many oval-shaped chlorotic dots or spots appear between the veins at the base of the heart and veins. Along the veins, they are arranged in different lengths. As the disease progresses, the symptoms gradually extend to the whole leaf. , In the rough veins formed a few different shades of different colors of chlorosis stripes, veins between leaves lose green and yellow, veins remain green, thus forming a clear yellow and green stripes. With the growth of corn, the disease condition is gradually serious, the chlorophyll of the diseased leaf is reduced, the leaf color is yellowing, the purple-red stripes are gradually appeared from the leaf margin of the leaf, and finally dry, the diseased plant is weak, thin, and the growth is slow. The plant height is often less than the strong strain. 1/2. Second, prevention and control measures: 1, choose disease-resistant varieties, coating species, seed dressing. Selection of disease-resistant inbred lines and hybrids, and the use of coated species can both prevent and treat other viral diseases. Carbofuran Suspension No. 2 100 ml seed dressing 50 kg control effect is very good. 2, appropriate sowing, strengthen field management. The end of sowing should be completed before April 20 to avoid the encounter time between sensitive period of corn seedlings sensitivity and the peak period of insecticidal insect activity, reduce the incidence, remove weeds in the field, reduce the number of locusts, and the base number of rice planthoppers, and timely destroy the fields. 3, cure warts and prevent disease. Timely eradication of drug-borne mites, early eradication of mites, timely eradication of mites, especially attention to seedling control. 4, pharmaceutical control. (1) 3.85% Virus 600-700x + 0.3% potassium dihydrogen phosphate. (2) Antitoxin agent 500 times + 0.3% potassium dihydrogen phosphate. Tetramisole Hcl,Albendazole Bolus,Multivitamin Premix,Diminazene Diaceturate NINGBO VOICE BIOCHEMIC CO. LTD , https://www.pharma-voice.com