In remote regions, the air is pure and the crops are free of poisonous insecticides.

在偏远地区，空气是纯净的，庄稼也不用有毒的杀虫剂。

Confine the use of insecticides to the evening and do not spray plants that are in flower.

只限晚间使用杀虫剂，并且不要对花期植物喷药。

Farm workers frequently come in contact with these insecticides.

农场工人常常接触这些杀虫剂。

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。

Put a stop to insecticides in your home and office.

无论是在家里还是办公室都不要使用杀虫剂。