GROWTH AND DEVELOPMENT OF ORGANIC ARSENICAL-SUSCEPTIBLE AND ARSENICAL-RESISTANT COMMON COCKLEBUR (XANTHIUM-STRUMARIUM) BIOTYPES UNDER NONCOMPETITIVE CONDITIONS
We. Haigler et al., GROWTH AND DEVELOPMENT OF ORGANIC ARSENICAL-SUSCEPTIBLE AND ARSENICAL-RESISTANT COMMON COCKLEBUR (XANTHIUM-STRUMARIUM) BIOTYPES UNDER NONCOMPETITIVE CONDITIONS, Weed technology, 8(1), 1994, pp. 154-158
The growth, development, and reproductive potential of several populat
ions of organic arsenical-susceptible (S) and -resistant (R) common co
cklebur biotypes were compared under noncompetitive field conditions.
Plant height, leaf area, aboveground dry weights, and relative growth
rate (RGR) were measured periodically during the growing season. Days
to flowering, bur dry weight, and number of burs per plant were also r
ecorded. Arsenical S- and R-biotypes were similar in all measured para
meters of growth, development, and reproductive potential. Populations
within each biotype varied occasionally in plant height, leaf area, a
boveground dry weights, and reproductive potential.