angular leaf spot of cotton

例句：

1. 1. The angular leaf spot of cottonis a major threat to the crop's health.
   棉花的叶角斑病是农作物健康的主要威胁。
2. 2. Thedisease can be spread bywind, and it'simportant to control it in the fields.
   这种病害可以通过风传播，因此控制田间是很重要的。
3. 3. Farmers need to take preventivemeasures against this disease to ensure thehealth of their cotton crops.
   农民需要采取预防措施来确保他们的棉花作物的健康。