Glossary beginning with W

Weed mutation


A permanent structural alteration in the DNA or RNA of a weed that affects all its offspring via seeds. Synonyms: weed mutations
Weed shifts


A change in the weed community within a field i.e. relative abundance or type of weeds. This can be the result of a management practice like herbicide use or any other phenomenon that brings about a change in weed species composition. Species or biotypes adapted to current weed management practices increase, whereas weeds susceptible to those practices decrease.

Authoritative On-line References and Resources A classic article on weed population dynamics on the Iowa State University Weed Science website. Synonyms: shifts in weed, weed shifts