Herbicide Resistant Weeds

Resistance of common cocklebur (Xanthium strumarium) to the organic arsenical herbicides.

Haigler, W. E., B. J. Gossett, J. R. Harris, and J. E. Toler. 1988. Resistance of common cocklebur (Xanthium strumarium) to the organic arsenical herbicides. Weed Science. 36: 24-27.

The presence of a X. strumarium population resistant to organic arsenical herbicides was confirmed in 3 adjoining counties of South Carolina's 10-county cotton-growing regions, but little evidence of resistance was found in the remaining 7 counties. This population was resistant to DSMA and MSMA but not to herbicides from 9 other chemical groups. A much greater level of resistance was apparent in the field than under greenhouse conditions and larger plants were more resistant than small plants.