A weed designated by law as especially undesirable and difficult to control is called what?

• A. Native weed
• B. Noxious weed
• C. Invasive weed
• D. Beneficial weed

Answer: (B)

The term describes a legal designation. When a weed is designated by law as especially undesirable and difficult to control, it is called a noxious weed. This status means authorities identify it as a plant that threatens agriculture, ecosystems, or public lands, and landowners may be required to control, eradicate, or prevent its spread using approved methods. The label helps focus regulatory attention and pesticide-use requirements on that particular weed.

Native weeds, by contrast, are simply plants that originated in the area; being native doesn’t automatically make them a noxious weed. Invasive weeds are non-native plants that spread aggressively, which can be problematic, but not every invasive species carries a legal noxious designation. Beneficial weeds are those that provide value, such as erosion control or habitat, and are not targets of noxious-weed control programs.