Mayweed Chamomile

Pest: Mayweed chamomile (Anthemis cotula), dog fennel

Pest Type: Annual broadleaf weed

Major Identifying Features: Spreading or erect, reaches 6 inches to 3 feet, finely dissected leaves, unpleasant odour when crushed, white daisy-like flowers

Life Cycle: Annual, germinates in early spring, flowering from April to August, reproduces by seed

Pest Rating: Moderate

Management Rating: Easy to moderate

Host/Season/Outbreak Information: Grows in the northwestern and central-western region of California up to 6000 feet, inhabits agricultural land and other disturbed areas

Damage Information: Can cause skin rashes to workers and blisters on noses and mouths of livestock, competitive, allopathic, may contaminate seed crops

Management Options: Prevention by sowing clean seeds, managing animal movement, cleaning equipment, minimizing soil disturbances, establishing competitive grasses, mechanical control by hand pulling and digging, cultural control by maintaining a vigorous pasture, proper irrigation, fertilizer applications, and harvesting, chemical control with herbicides such as Buctril and Clarity

Sources:

http://www.unce.unr.edu

http://www.ipm.ucdavis.edu

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