害虫

Cyanide is used to kill insects.

氰化物可用来杀害虫.

Frogs help control pests that harm crops and spread disease.

青蛙帮助控制危害庄稼、传播疾病的害虫。

The use of integrated pest management will expand in the twenty-first century.

在二十一世纪,害虫综合治理的应用将扩大.

Rodents carry diseases and are generally regarded as pests.

啮齿目动物传播疾病,常被当作害虫对待.

Some communicable diseases are transmitted only through the agency of vermin or insects.

某些传染病只通过害虫和昆虫来传播.

Chemical compounds designed to eliminate pests often act as pesticide irritants.

旨在消灭害虫的化合物常常作为杀虫剂刺激物发挥作用。

Many pests are resistant to the insecticide.

许多害虫对这种杀虫剂有抵抗力.

Insecticides are widely used for controlling most insect pests.

杀虫剂广泛应用于防治大多数害虫.

Because the kitchen was dirty, it was overrun by insects.

由于厨房脏, 所以害虫在那里大量出没.

Each year ten percent of the crop is lost to a pest called corn rootworm.

一种叫玉米根虫的害虫每年会让粮食减产10%。

He dusted a powder over his roses to kill all the insects.

他在玫瑰花上撒了药粉以杀死所有的害虫.

Rarely can permanent control be achieved by a single application of spray.

使用一次药剂防治难于持久地控制害虫.

The severe frost killed off most of the insect pests.

严霜杀死了大多数害虫.

One hundred million rats are killed annually by pest control experts who kill them to protect public health.

每年，害虫防治专家会杀死1亿只老鼠以保护公众健康。

White Ants are probably the most serious wood-destroying pests.

白蚁可以算得一破坏木材最严重的害虫.