tree mildew

例句：

1. 1. The tree mildew has been spreading rapidly across the region.
   该地区的树木霉菌正在迅速蔓延。
2. 2. The farmers have to deal with the tree mildew every spring.
   农民们每年都得处理春季的树木霉菌问题。
3. 3. To prevent the spread of tree mildew, it's important to regularly inspect and treat trees.
   为了防止树木霉菌的传播，定期检查和治疗树木非常重要。