降雨在病害传播中发挥了重要作用。

Rainfall played an important role for disease dispersal.

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动植物病害传播极快。

Disease of animal and vegetable pests propagate with extreme rapidity.

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要在美洲种植橡胶树很难，因为有一种叫做“叶枯病”的病害存在，橡胶树的间距必须很大（译者注：防止病害传播）。

Growing Hevea in the Americas is hard. A disease called leaf blight means the trees have to be spaced widely.

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随着今年降雨量不断增多，黑荚病，一种由真菌引起病使可可减产的植物病害传播流行开来，上诉农户的行为就产生了较大的影响。

That matters because higher rainfall in recent years has increased the prevalence of “black pod”, a fungal disease which lowers cocoa yields.

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同时，修剪工具也会将病害从一个植株传播到另外一个。所以，在修剪每个植株之后，一定要用酒精或漂白剂消毒。

Also, tools can spread disease from one plant to another. So be sure to disinfect tools with alcohol or bleach after each plant.

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同时，修剪工具也会将病害从一个植株传播到另外一个。所以，在修剪每个植株之后，一定要用酒精或漂白剂消毒。

Also, tools can spread disease from one plant to another. So be sure to disinfect tools with alcohol or bleach after each plant.

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