The use of herbicides and intensive forms of agriculture means that fields of wheat and barley now have few weeds.

除草剂的使用和集约型农业使得现在小麦和大麦麦田里几乎没有杂草。

The results of this study will provide a theoretical basis for further developing trichothecenes as biological herbicides and insecticides.

这项研究的结果将为进一步开发天花粉作为生物除草剂和杀虫剂提供理论依据。

It took lots of herbicides to make it work but that's another story.

不过，这样做，得用许多除草剂，这又是另一回事了。

More environment friendly as they require less herbicides and pesticides.

环境破坏小，因为种植它们所需要的除草剂及杀虫剂更少。

Pete: and farmers can decrease their use of dangerous herbicides and pesticides.

彼得：而农民就能减少使用危险的除草剂和杀虫剂。