Blueweed (Echium vulgare L.)

Blue weedBiennial forb with numerous blue tube flowers on upperside of a short stem. Stems grow 30-80cm tall covered in short hairs. Leaves are also covered in hairs and are narrow (6-25cm long) and go up the entire length of the stem. It has long taproots with smaller fibrous lateral roots. The seeds are described as nutlets in clusters of 4 about 3mm long.

LRISS Category: ERADICATE

Habitat and Ecology

Blueweed grows in disturbed habitats like dry roadsides, rocky pastures and rangelands. It occurs and low to mid elevations in BC and is well – adapted to dry, rocky, shallow soil especially over limestone.

Impacts

Blueweed can invade rangelands and pastures. Seeds can contaminate clover, crop seeds and act as a host for viral diseases. Infestations tend to increase in overgrazed pastures because it is generally unpalatable to livestock. The main mode of reproduction is by seed which can remain viable in the soil for several years.

Management

Repeated cutting, digging and pulling small infestations can manage infestations. Remove in the first year or before it sets seed. Please contact LRISS for all other treatment information.

References

http://www.agf.gov.bc.ca/cropprot/weedguid/blueweed.htm

Province of British Columbia. 2002. A Guide to Weeds in British Columbia.

http://www.agf.gov.bc.ca/cropprot/fieldcrop/index.htm