Healthy trees are also better able to fend off insects.

健康树种防御害能力更加强大。

Under primitive agricultural conditions the farmer had few insect problems.

在原始农业条件下，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，还有害，存在各种不确定因素。

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

近年来，池塘和湖泊害警告已成为家常便饭。

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

这笔资金使美国对害人道主义援助达到1900万美元。

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

而其他地区洪水不断。害或物疾来了威胁。

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

健康土壤会减少害 并且帮助农物茁壮成长。

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

询问园艺中心工人员有关害管理做法是很重要。

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

每一年，有40%潜在粮食产量都损失于害和疾。

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

害和疾会导致养蜂人受损。有时营养不良会导致这种情况。

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

不在一块草地上过量放牧动物会减轻害传播。

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

因此人们开始引进一种称“小丑瓢”亚洲物种，以此为控制自然害手段。

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

另一个担忧是抗害转基因生物——它们可能会随着时间推移而失效。

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。把化肥为防治农物害和提高产量重要手段。

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，能抑制害和增强养分吸收。

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

农物生物多样性是对未来可能发生害、气候变化等重大灾害最好防卫 。

And 80 percent of survey respondents want hotels to do the same-even if the infestation is long gone.

80%受访者希望酒店能公开类似信息，即使害早已不复存在。

Gossypol was left at natural levels in the rest of the plant because it guards against insects and disease.

植株其他部分棉籽酚保持在正常水平，因为它可以预防害。

Whereas if you plant a forest, you've got to worry about forest fires, bugs, etc. , releasing that carbon.

不论你在哪种植森林，你都需要去担心森林大火，害，碳排放等等问题。