WSU Whatcom County Extension

Integrated Pest Management for Blueberries

Common Catsear

(Hypochaeris radicata L.)

Perennial Broadleaves

 

Common Catsear

Habitat Characteristics

Often found in lawns, gardens, and waste places, Common Catsear is an extremely aggressive weed of lowland pasture and lawn, where it appears to need a considerable amount of moisture to reproduce well.

 

Identification

Common Catsear is a perennial plant with basal rosettes of leaves and a long, thick, fleshy taproot. The leaves are rough-hairy and lobed or wavy-margined. The yellow flowers occur in heads that are 1 – 1½ inches in diameter and sit on tall flowering stems. Common Catsear is very similar to the dandelion, but differs in that dandelions bear a single hollow flower stalk and Catsear will produce more than one flower stalk per plant.

Catsear

Dandelion vs Catsear Flowers

Dandelion vs Catsear Leaves

Life History

This perennial weed has vegetative growth in the spring and flowers from May through August. It reproduces by seeds, but can spread through multiplication of its crown and root sections.

 

Management

Cultural Techniques

     - Badly infested fields should be cultivated.

Chemical Techniques

     - See Herbicide Efficacy Table (pdf)

 

Web References

USDA – NRCS Plant Profile, Common Catsear
http://plants.usda.gov/java/profile?symbol=HYRA3&photoID=hyra3_1v.jpg

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

Invasive Species, The Source for Information and Images of Invasive & Exotic Species, Catsear
http://www.invasive.org/browse/subject.cfm?sub=5740

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