Healthy trees are also better able to fend off insects.

健康的树种防御害的能力更加强大。

Just thinking about a bug infestation is uncomfortable.

仅仅想到害就让人不舒服。

Under primitive agricultural conditions the farmer had few insect problems.

原始农业的条件下，农民很少遇到害问题。

From too much water to too little, to pests, a lot can happen.

涝灾、旱灾，还有病害，存各种不确定因素。

Not grazing so many animals on a given patch of land would discourage transmission.

不草地上过量放牧动物会减轻害传播。

In recent years, warnings of infestations in ponds and lakes have become routine.

近年来，池塘湖泊的害警告已为家常便饭。

These new crops must also be more resistant to drought, heat, and pests.

这些新的作物还必须对干旱、高害有更强的抵抗力。

This new funding brings the U.S. humanitarian response to the infestation to $19 million.

这笔新资金使美国对害的人道主义援助达到1900万美元。

And there may be threats from new pests or plant diseases.

而其他地区洪水不断。新的害或作物疾病也带来了威胁。

A healthy soil reduces disease and helps crops grow strong and healthy.

健康的土壤会减少病害 并且帮助农作物茁壮长。

It is important to ask the garden center workers about pest-management practices.

询问园艺中心的工作人员有关害管理的做法是很重要的。

Each year, 40 percent of the potential harvest is lost to pest and disease.

每年，有40%的潜粮食产量都损失于害疾病。

Pests and diseases can cause that. Sometimes the insects are malnourished.

害疾病会导致养蜂人受损。有时营养不良也会导致这种情况。

So people began importing an Asian species called the harlequin ladybird as natural pest control.

因此人们开始引进种称作“小丑瓢”的亚洲物种，以此作为控制自然害的手段。

Another concern is about pest-resistant GMOs — that they can stop working over time.

另个担忧是抗害的转基因生物——它们可能会随着时间的推移而失效。

The seller claimed to be unaware of it, despite 2 pest control reports on the matter.

卖家声称不知道这件事，虽然有两份与此相关的害防治报告。

Others objected that Carson hadn't mentioned DDT's role controlling the threat insects posed to human health.

其他人则批判卡森对滴滴涕避免人体遭受害的功效闭口不言。

Many farmers welcomed them as a great way to stop crop disease and increase production.

很多农民喜欢使用化肥。把化肥作为防治农作物病害提高产量的重要手段。

Some of these microbes are beneficial to the plant, suppressing disease and helping it extract nutrients.

有些微生物是对植物有益的，能抑制病害增强养分吸收。

Agricultural biodiversity is the best hedge against future blights, including pests, diseases and climate change.

农作物生物多样性是对未来可能发生的病害、气候变化等重大灾害最好的防卫 。