Viral diseases are spread by planthoppers, aphids or thrips. To prevent and control viral diseases, we must first control these vectors. Diclofenac, pymetrozine, imidacloprid and thiamethoxam are recommended. Add chlorobromoisocyanuric acid, ningnanmycin, tetracycline, amino oligosaccharide or lentinan, and add foliar fertilizer, zinc fertilizer, cytokinin or brassin. Add avermectin spray.