Yellow rabbitbrush is a  rounded deciduous shrub and member of the aster family, Asteraceae, that also includes daisy, sagebrush, and lettuce.  It is native to  western North America and can be found from British Columbia south to southeastern California, and east to north Dakota, Arizona, New Mexico, and Texas.  Plants  are resistant to drought,  grow well in alkaline and saline soils, and do especially well in soils rich in calcium.  They are adapted to desert and semidesert conditions and rapidly move into disturbed sites such as burned or overgrazed areas.  Yellow  rabbitbrush is important for wildlife as a source of both cover and food.Description: With a deep taproot and many major horizontal secondary roots, yellow rabbitbrush grows 1-5′  tall with many brittle branching stems that are pale colored.    The thread-like  leaves  are up to 2′ long and may be twisted or curved.   Tubular yellow disc flowers appear from late summer to fall in bushy clusters of terminal flowerheads less than 2 1/2″ across  and lined with sticky yellow-green leaf-like structures, and are followed by an abundance of very small  achene fruits tipped with hairs that facilitate wind dissemination.   Plants reproduce by seed that do not persist long in the soil and  by basal sprouting.

Control: Mulch to suppress seedsgermination, pull or hoe young seedlings, and pull or dig out older plants before they set seed. Cutting, mowing or burning is not effective because new plants will sprout  at the base of old ones.  Severe problems are difficult to control because herbicides are not very effective.  For the best results apply 2,3-D during periods of active growth and high soil moisture.

 

 

By Karen