Correct

锈病

/ xiù bìng / 
Strokes

Example

As a Noun

rust (disease)

1
Xiǎomài
小麦
  
/
píngguǒ
苹果
  
/
gǔwù
谷物
xiùbìng
锈病

wheat/apple/grain rust

2
Mùshǔ
木薯
xiùbìng
锈病

rust of cassava

3
Xiùbìng
锈病
fángzhìjì
防治剂

rust preventer