
Dodder (Cuscuta gronovii)
Any of the leafless, twining, parasitic vines (
see parasitism) that make up the genus
Cuscuta (family Cuscutaceae), containing more than 150 species found throughout temperate and tropical regions. The stringlike stems may be yellow, orange, pink, or brown. Many species have been introduced with their host plants into new areas. Dodders contain no
chlorophyll, instead absorbing water and food through rootlike organs called haustoria that penetrate the tissue of a host plant and may kill it. Dodder can do great damage to crops of
clover,
alfalfa,
flax,
hops, and
beans. The best control is to remove the plant from fields by hand and to prevent its accidental introduction.
Learn more about dodder with a free trial on Britannica.com.
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.