leaf spot of banana

例句：

1. 1. The banana plant is suffering from a leaf spot that has been spreading rapidly.
   香蕉植株正遭受一种迅速蔓延的叶斑病。
2. 2.The farmer applied a new fungicide to the affected leaves to control the leaf spot.
   农民给受影响的叶子施用了一种新的杀菌剂来控制叶斑病。
3. 3. The health of the banana plant is crucial in preventing leaf spot outbreaks.
   香蕉植株的健康对于预防叶斑病爆发至关重要。