Herbicide Resistant Weeds

Growth and development of organic arsenical-susceptible and -resistant common cocklebur (Xanthium strumarium) biotypes under noncompetitive conditions.

Haigler, W. E., B. J. Gossett, J. R. Harris, and J. E. Toler. 1994. Growth and development of organic arsenical-susceptible and -resistant common cocklebur (Xanthium strumarium) biotypes under noncompetitive conditions. Weed Technology. 8: 154-158.

In field trials conducted near Clemson during 1986-88, the growth, development and reproductive potential of several populations of DSMA-susceptible (S) and -resistant (R) X. strumarium biotypes were compared under non-competitive conditions. Plant height, leaf area, above-ground DW and RGR were measured periodically during the growing season. Days to flowering, bur DW and number of burs/plant were also recorded. S and R biotypes were similar in all measured parameters of growth, development and reproductive potential. Populations within each biotype varied occasionally in plant height, leaf area, above-ground DW and reproductive potential. It was concluded that DSMA resistance had no effect on X. strumarium fitness.