Lesser Swinecress

Pest: Lesser Swinecress (Coronopus didymus)

Pest Type: Annual Broadleaf Weed

Major Identifying Features: Low growing or prostrate, leaves have a distinctive skunk-like odor, alternate leaves, divided into narrow segments, short hairs on the tips, forms rosettte, grows 20 inches long, deeply lobed leaves, tiny white four petaled flowers, seed pot with wrinkled surface

Life Cycle: Winter or summer annual, sometimes biennial, blooms from February to October, reproduces by seed

Pest Rating: Moderate

Management Rating: Moderate

Host/Season/Outbreak Information: Grows in alfalfa pastures, vegetable crop fields, orchards, nurseries, gardens, turf, roadsides

Damage Information: Milk from dairy cattle can have an unpleasant flavor if cow eats it, problematic in newly planted alfalfa fields in Sacramento, San Joaquin, and Imperial Valleys

Management Options: Prevention and cultural weed control, chemical control with herbicides (warning with the use of chemical substances!)

Sources:

http://www.ipm.ucdavis.edu

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