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水芋病毒病水芋病毒病主要危害水芋叶片。主要由蚜虫传播,长江以南5月中下旬至6月上中旬为发病高峰期。病叶沿叶脉呈现出褪绿黄斑或条斑,扩展后呈黄绿相间花叶,严重的植株明显矮化,新生叶还常出现羽毛状黄绿色斑纹或叶片扭曲畸形。严重的植株有时维管束呈淡褐色,分蘖少,球茎退化变小。防治方法:发病初期,喷施叶面营养剂(如叶面宝或0.1%～0.2%磷酸二氢钾等)加0.05%～0.1%黑皂或肥皂,或5%菌毒
Callus virus disease callus virus disease is the main hazard callus leaves. Mainly spread by aphids, south of the Yangtze River in late May to mid June for the peak incidence. The diseased leaves showed chlorosis yellow spots or streaks along the veins. After expansion, yellowish green and white cymbidium appeared. Severe dwarf plants were dwarfed. New-born leaves also often appeared feathery yellow-green stripes or deformed leaves. Occasionally severe vascular bundles were light brown, less tillers, corms degeneration smaller. Prevention and treatment methods: early onset, spraying foliar nutrients (such as foliar or 0.1% to 0.2% potassium dihydrogen phosphate, etc.) plus 0.05% to 0.1% black soap or soap, or 5%