The apple ring spot is an important disease and happens often at the apples growth and storage period.

苹果轮纹病是苹果生长期和贮藏期经常发生的一种主要病害。

youdao

The apple ring spot is an important disease and happens often at the apples growth and storage period.

苹果轮纹病是苹果生长期和贮藏期经常发生的一种主要病害。

youdao