They focus on keeping their soil rich and free of disease.

农民关心的是保持土壤肥沃并且免受害。

Blight is a name for any plant disease.

枯萎是对任何植物害的统称。

And plant diseases are often a big deal for more than just plants.

植物害通常不仅仅是植物的大问题。

And it became a disease that is really killing billions of trees.

然而这衍生为一种害， 数亿植株遭到灭顶之灾。

The disease can go years without being seen due to its long lifetime.

这种植物害由于存在时间长，可以潜伏多年而不被发现。

The TR4 disease only affects the most popular and common kind of banana – the Cavendish.

TR4害只影响最受欢迎和最常见的卡文迪什香蕉。

It can be ten years before a tree is killed.

一棵树感染该植物害可能过十年才会死掉。

Big Mike was destroyed in the 1960s by the same disease that is now threatening Cavendish.

" 大麦克" 在20世纪60年代被同样威胁卡文迪什的害摧毁。

Officials have removed plants infected with the disease and covered soil with black plastic sheets to prevent spread of the disease.

官员们已经移除了感染这种害的植物，并用黑色塑料薄膜覆盖土壤，以防止害的传播。

So, trees need immunity because they're under attack, either from disease or from living things wanting to eat them.

因此，树免疫力，因为它们受到攻击，无论是来自害还是来自想吃掉它们的生物。

So far, the disease has been found on six farms near Colombia's border with Venezuela.

到目前为止，人们在哥伦比亚与委内瑞拉边境附近的六个农场发现了这种害。

In Colombia, officials are taking special measures to stop the disease from spreading.

在哥伦比亚，政府官员正采取特别措施阻止害传播。

TR4, one of the deadliest plant diseases out there.

TR4，最致命的植物害之一。

The dogs can detect the disease weeks to years before it appears on tree leaves and roots, the researchers report.

研究人员报告称，在这种害出现在树叶和树根部数周甚至数年之前，狗狗就可以探测到它。

The oak trees are dying from some sort of disease.

这些橡树正在死于某种害。

The oak trees are dying from some sort of disease.

这些橡树正在死于某种害。

And disease-free seedlings means damaged landscapes have a better chance at bouncing back.

没有害的幼苗意味着受损的景观更有可能恢复原状。

Crop illness may happen very often.

农作物害可能经常发生。

The country's military and police are also guarding banana farms to keep thieves from spreading the disease through their clothes and shoes.

该国的军队和警察也在守卫香蕉农场，以防止小偷通过衣服和鞋子传播害。

He added that Asian countries affected by the TR4 disease have planted different kinds of Cavendish or moved to uninfected farmlands.

他补充说，受TR4害影响的亚洲国家种植了不同种类的卡文迪什或迁移到未受感染的农田。