purple root rot

例句：

1. 1. The plant was suffering from purple root rot, which affected its growth severely.
   这株植物患有紫色根腐病，严重影响了它的生长。
2. 2. The farmer noticed that the potatoes were showing signs of purple root rot and decided to treat them immediately.
   农民注意到土豆出现了紫色根腐病的迹象，决定立即治疗。
3. 3. The researcher found that the soil had high levels of phosphorus, which could be a contributing factorto purple root rot in this region.
   研究人员发现土壤中磷含量较高，这可能是该地区紫色根腐病的一个原因。