| herbicides | Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses, and woody plants. (12 Dec 1998) |
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| 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) |
| microbial herbicides | <biology, ecology, plant biology> Microorganisms that are toxic to specific plants or insects. Because of their narrow host range and limited toxicity, these microorganisms may be preferable to their chemical counterparts for certain pest control applications. (29 Oct 1998) |
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