Open AccessTHE BIOLOGY OF CANADIAN WEEDS.: 78. Galeopsis tetrahit L.
Author(s) -
John T. O’Donovan,
Minakshi Sharma
Publication year - 1987
Publication title -
canadian journal of plant science/canadian journal of plant science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.338
H-Index - 59
eISSN - 1918-1833
pISSN - 0008-4220
DOI - 10.4141/cjps87-106
Subject(s) - weed , limiting , agronomy , crop , habitat , biology , ecology , range (aeronautics) , nutrient , soil water , agroforestry , mechanical engineering , materials science , composite material , engineering
Galeopsis tetrahit is an annual weed which was introduced to North America from Eurasia. It is present in all Canadian provinces and occupies a wide range of habitats including cultivated fields. It favors well-watered nutrient-rich soils and occurs infrequently in the drier brown soil zones of the southern Canadian prairies. Low soil moisture may be a major factor limiting its distribution and spread. It can reduce crop yields, contaminate crop seed and act as a reservoir for disease-causing organisms. A number of herbicides are available for its control.Key words: Hemp-nettle, Galeopsis tetrahit L., weed ecology, weed biology