Blecker, L., Creech, E., Dick, J., Gephart, S., Hefner, M., Kratsch, H., Moe, A., Schultz, B. 2021, Nevada Noxious Weed Field Guide – Mayweed chamomile, Extension, University of Nevada, Reno, Field Guide

Stem

  • 0.5-2 ft. tall, highly branched and bushy
Photo of white flower bush
 

Leaves

  • Alternate, finely and deeply divided, up to 2.5 inches long and sometimes hairy
Photo of mayweed chamomile infestation
 

Flower

  • Daisy-like; 0.5-1 in. diameter; yellow center with 10-15 white petals
Photo of mayweed chamomile plant with white flowers
 

Root

  • Short, thick taproot
African Mustard

Other

  • Grows best on disturbed sites; often infests roadsides, waste areas, landscaped areas and crop fields; known to occur in Carson City, Douglas, Lyon and Washoe counties
  • Annual; reproduces by seed 
  • Foliage has a foul odor when crushed; reported to irritate the skin of livestock and change the milk flavor of lactating animals
  • Also known as dog fennel
 

Control

  • Cultivation or mowing prior to seed set can be effective
  • Apply clopyralid, dicamba, metsulfuron, picloram or tribenuron to actively growing plants

Learn more about the author(s)

Heidi Kratsch
Heidi Kratsch
 

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