识别与危害Identification & damage
甘蔗花叶病毒，可使叶片出现深浅相间的花纹。几种病毒都能造成花叶，肉眼不能把它们分清。
SCMV can cause irregular light and dark green leaf patterns. Several viruses cause mosaic; appearance cannot separate them.
来源与传播Origins & spread
带毒种蔗可以把病毒带入新田，外观正常也要检测。部分禾本科寄主也能带毒，要结合当地调查追查。已知媒介蚜虫刺探叶片时，可以传播这种病毒。这种传播可很快发生，杀虫剂不等于阻断传毒。
Infected seedcane carries virus; normal-looking stock needs testing. Some grass hosts carry virus; trace sources with local evidence. Known aphid vectors can transmit SCMV while probing leaves. Transmission can be rapid; insecticide does not guarantee prevention.
生活史与微观过程Life cycle & microscopic processes
病毒借用活细胞复制，再向相邻组织扩展。它不是虫卵，不会在叶片上孵化成害虫。
The virus replicates in living cells and spreads through tissues. Viruses are not insect eggs and do not hatch into pests.
田间检查与确认Inspection & confirmation
沿路线观察新叶，记录花叶、株高和田内分布。缺素等也会改变叶色，必须结合实验室结果。按实验室要求采叶，记录品种、蔗龄和种苗来源。用核酸检测区分病毒，同时留意混合感染。
Scout new leaves; record mosaic, growth and field distribution. Nutrient disorders also alter colour; use laboratory evidence. Sample as the lab directs; record cultivar, age and seed source. Use molecular tests to identify viruses and mixed infections.
预防、治理与复查Prevention, management & follow-up
种植检测合格的种苗，选用当地适宜的抗病品种。种苗圃持续复检，切蔗工具按规范清洁处理。确诊病株不再作种苗，按当地方案清除或更新。喷药不能治愈感染株，重点是阻止再次扩散。
Plant tested stock and locally suitable resistant cultivars. Retest nursery stocks and clean cutting tools as specified. Do not propagate infected plants; rogue or renew as locally advised. Sprays do not cure infected cane; focus on preventing spread.