| A | B |
| herbicide | to kill weeds |
| insecticide | to kill insects |
| pesticide | used to control undesirable plants or animals |
| phytotoxicity | impact of a chemical on a plant |
| systemic | chemical taken up by the plant to kill insects chewing on the leaves |
| toxicity | capacity of a substance to be poisonous |
| LD 50 | milligrams of toxicant to kill 50% of population |
| exclusion | prevent pathogen from being introduced |
| eradication | steps taken to completely curtail its spread |
| protection | isolation from pathogens |
| resistance | genetic origin is a way of protection |
| fungicides | to kill fungi |
| nematicides | to kill nematodes |
| rodenticides | to kill mice and rats |
| molluscides | to kill mollusks |
| miticides | to kill mites |
| aviacides | to kill birds |
| pesticide label | piece of paper with instructions, enforces the laws |
| detection | to realize there is a problem with your plant |
| gibberellic acid | growth regulator |