Among the three major types of pesticides (agricultural pest-control agents) herbicides are used to control weeds, or undesirable plants.

A mycoherbicide is a herbicide based on a fungus used as a control agent for weeds and other undesirable plants.

Chemical, mechanical, and other methods are used to control or eradicate undesirable aquatic plants.

Establish integrated management systems (as defined in the Act) to control or contain undesirable plants targeted under the cooperative agreements.

It also found that the wetlands had been colonized by undesirable plants but that in most cases, no corrective action had been taken.

All undesirable plants should be removed.

Dr. Sands and others believe that the use of fungal disease is an ideal way to kill a broad range of undesirable plants.

The pig not only roots and digs, exposing virgin soil to invasive species, but disperses seeds from undesirable plants as it travels.

As the undesirable plants die, their leaves sink to the bottom, where they decay, using up still more oxygen, making the colder depths barren and lifeless.

For example, the word "weed" can be interpreted as an undesirable plant in a yard, or as a euphemism for marijuana.