| Answer | Crossword Clue |
|---|---|
| heptachlors | HEPTACHLOR, a very toxic pesticide |
| heptachlor | a very toxic pesticide |
| ethions | highly toxic organophosphate, C9H22O4P2S3, used as a pesticide |
| ethion | highly toxic organophosphate, C9H22O4P2S3, used as a pesticide |
| toxicant | A toxic substance introduced into the environment, e.g., a pesticide |
| nitrochloroform | a toxic lachrymatory liquid used as a pesticide and a tear gas |
