black rot of cucurbits

例句：

1. 1.The disease is a major cause of crop failure in the region.
   这种疾病是该地区农作物失败的主要原因。
2. 2. Farmers need to take preventive measures against this disease.
   农民需要采取预防措施来防止这种病。
3. 3.The black rot of cucurbits has been identified as a significant threat to food safety.
   已经确认，南瓜黑腐病对食品安全构成了重大威胁。