frog-eye leaf spot of tobacco

例句：

1. 1. The farmer noticed theunusual symptoms on his tobacco plants and suspecteda frog-eye leaf spot.
   这位农民注意到他的烟草植物出现了不寻常的症状，怀疑是蛙眼叶斑病。
2. 2.The disease spread rapidly through the tobacco fields, causing significant yield losses.
   这种疾病迅速在烟草田中传播，导致严重的产量损失。
3. 3.To prevent the spread of this disease,farmers must maintain good sanitation practicesand use resistant varieties of tobacco.
   为了防止这种疾病的传播，农民必须保持良好的卫生习惯，并使用抗病品种的烟草。