溃疡病

tā tí chū le guān yú kuì yáng bìng bìng yīn de xīn lǐ lùn

他提出了关于溃疡病病因的新理论。

He developed a new theory about the cause of canker.

bì miǎn yáng shù kuì yáng bìng de yǒu xiào fāng fǎ shì zhòng zhí kàng bìng pǐn zhǒng

避免杨树溃疡病的有效方法是种植抗病品种。

The effective method of avoiding canker in poplar trees is to plant resistant varieties.