1.   Control has often centred on powerful organochlorine pesticides, which kill the locusts but can then damage the environment.

2.   The hawk, which was found to have ingested a very powerful pesticide called carbofuran, recovered.

3.   The usual way of controlling mites is to kill them with powerful pesticides or to seal mattresses in plastic covers.

4.   Chromated copper arsenate is a powerful pesticide put into lumber under pressure in a factory to protect the wood from decay and insect damage.

5.   The arsenic comes from wood treated with chromated copper arsenate, a powerful pesticide injected into the lumber to protect it against termites, beetles and humidity.