Common Catsear

Pest: Common catsear (Hypochaeris radicata)

Pest Type: Perennial Broadleaf Weed

Major Identifying Features: Forms a rosette in turf, grows to 2-3/5 feet tall, leaves are lobed or sawtoothed with coarse yellow hairs, flashy taproot, tiny yellow flowers (resemble dandelion)

Life Cycle: Perennial, seeds germinate fall through spring, blooms from May to November, reproduces by seed or shoots that grow in the crown area

Pest Rating: Moderate

Management Rating: Moderate

Host/Season/Outbreak Information: Grows in California in the Northwestern region, Cascade Range foothills, northern Sierra Nevada foothills, Sacramento Valley, central-western region, and South Coast up to 1600 feet elevation, spreads on overgrazed pastures and rangeland, drought tolerant

Damage Information: Displacement of native species, not as invasive in intact ecosystems, seeds attach to clothing and fur

Management Options: Cultural control by cultivating infested fields and ecosystems, chemical control with herbicides, WARNING ON THE USE OF CHEMICALS

Sources:

http://www.whacom.wsu.edu

http://www.ipm.ucdavis.edu

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