| herbicide | <chemical> A chemical used to kill or control the growth of plants. Some herbicides (such as synthetic auxins and triazine) selectively kill broad-leaved plants while leaving grass-leaved plants (i.e., cereal crops) unharmed. Other herbicides, such as paraquat, kill all plants. Herbicide use has dramatically increased crop yield worldwide but has caused serious environmental problems, polluting soil and water and causing health hazards for humans and animals. See: pesticide. (09 Oct 1997) |
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| herbicides | Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses, and woody plants. (12 Dec 1998) |
| herbicides, carbamate | Herbicides which owe their activity to the carbamate moiety in the molecule. (12 Dec 1998) |
| herbicides, triazine | Herbicides which owe their activity to the triazine moiety in the molecule. (12 Dec 1998) |
| herbicides, urea | Herbicides which owe their activity to the urea moiety in the molecule. (12 Dec 1998) |