- Winter annual.
- Low growing, freely branched weed.
- Leaves are opposite, hairy and twice divided into narrow segments or lobes.
- Flowers are small and inconspicuous.
- Fruit, clustered in leaf axils, have sharp spines and can cause injury to humans.
- Reproduces by seed.
Control Methods
- Hand Removal or Hoeing
- Herbicides:
- Preemergence - atrazine*, simazine*. (Apply in the fall)
* Excellent tolerance in centipede and St. Augustine grass.
Tolerance in DORMANT bermuda and zoysia at low label rates. See label for
appropriate turfgrass.
- Postemergence - combination of these products:
[dicamba**, MCPP**, 2,4-D**, and/or 2,4-DP**]
- bentazon, imazaquin***.
(Apply in the fall or winter during warm period above 60 ºF.)
** Use lower rates on centipede and St. Augustine grass.
Do not use within the root zone of desirable plants, especially dicamba.
*** Calibration is critical to avoid over application and turf injury.
Do not use within the root zone of desirable trees and shrubs.
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Dark reddish purple leaves
with purple flowers.
Sharp spines in leaf axils.
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