WSU Whatcom County Extension

Integrated Pest Management for Blueberries

Dandelion

(Taraxacum officinale)

Perennial Broadleaves

 

Habitat Characteristics

Dandelion is a weed of turf grass, orchards, nursery crops, alfalfa, and other perennial crops. It tolerates many soil types and cultural practices but does not tolerate cultivation.

 

Identification

The mature plant has a basal rosette of leaves with flowers emerging on leafless, hollow stalks. The leaves generally lack hairs, and are oblong with deeply lobed margins. Flowers are bright yellow, 1-2 inches in diameter. The taproot is thick and fleshy and can potentially reach several feet long.

Dandelion vs Catsear Flowers

Dandelion vs Catsear Leaves

Life History

Seedlings emerge from late spring to early autumn, with most emerging in early summer. Rosettes remain green throughout the year. Flowers are produced from May to June, with a second bloom in autumn. Dandelions do not require pollination in order to produce viable seed. Seeds are attached to a feathery stalk to aid in distribution.

 

Management

Cultural Techniques

     - Cultivation will effectively eliminate plants.

Chemical Techniques

     - See Herbicide Efficacy Table (pdf)

 

Web References

USDA – NRCS Plant Profile, Common dandelion
http://plants.usda.gov/java/profile?symbol=TAOF

University of California IPM, Weed Gallery, Dandelion
http://www.ipm.ucdavis.edu/PMG/WEEDS/dandelion.html

Invasive Species, The Source for Information and Images of Invasive & Exotic Species, Common Dandelion
http://www.invasive.org/browse/subject.cfm?sub=3887

Secondary content using h2 tag. Column 2

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Heading using the h3tag

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

WSU Whatcom County Extension • 1000 N. Forest St., Bellingham, WA 98225 • (360) 778-5800 • whatcom@wsu.edu