The weather had exacerbated another problem by now: mildew, oidium and…..snails.
到现在，天气加剧了另一个问题：霉菌，粉泡菌和……蜗牛。
The oidium and the snails (which eat the young shoots) had shown up very early, in April, and were generally dealt with effectively right then.
粉泡菌和蜗牛（专吃嫩芽）出现的非常早，在4月就见端倪了，并得到了有效的处理。
英语百科
Oidium
（重定向自Oidia）
An oidium (plural: oidia) is an asexually produced fungal spore that (in contrast to conidia) is presumed not to constitute the main reproductive preoccupation of the fungus at that time.
The hypha breaks up into component cells/ small pieces and develop into spores. Oidia cannot survive in unfavourable conditions.