Weeds to Watch
African Rue (Peganum harmala L.) and Camelthorn [Alhagi pseudalhagi (Bieb) Desv.] are two newer and lesser known
invasive weeds that are members of the Southwest's “Dirty Dozen. ”
African Rue
- African rue spreads rapidly. tends to dominate where established, is toxic to livestock, possibly
allelopathic and is difficult to control.
- It is common in disturbed areas, such as roadsides, rights of way, watering facilities and graded
sites.
- Management tips
- Mechanical methods are unsuccessful unless integrated with other techniques.
- There has been no research on classic biological controls; however, maintaining a
healthy, competitive plant community is a good defense since most infestations are in
highly disturbed areas.
- Herbicides can be effective and economical for large infestations. However, the
open space created needs to be filled with competitive, desirable plants.
Camelthorn
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