| chemical herbicide | 0.53 | In both cases, their appetites allow states to reduce the use of chemical herbicides. | ||
| new herbicide | 0.33 | Colombian authorities urged to use a powerful new herbicide on illegal drug crops. | ||
| powerful herbicide | 0.33 | Colombian authorities urged to use a powerful new herbicide on illegal drug crops. | ||
| pre-emergent herbicide | 0.33 | Understanding a bit about pre-emergent herbicides will help you avoid the more common reasons for failure. | ||
| banned herbicide | 0.26 | German authorities were searching Monday for the source of a banned herbicide that was found in organically grown wheat used as chicken feed. | ||
| common herbicide | 0.26 | That raises the threat of superweeds impervious to common herbicides. | ||
| systemic herbicide | 0.26 | You can CAREFULLY apply a systemic herbicide for some possible relief of these vines. |