Table 1: Number of Palmer amaranth biotypes controlled at least 90% by glyphosate and thifensulfuron and the number and percentage of Palmer amaranth biotypes not controlled by the highest rate of glyphosate and thifensulfuron.

HerbicideNumber of Palmer amaranth biotypes
Controlled 90% by each rateControlled less than 90% by the highest rate*

g ae ha−1

Glyphosate280560840   126 ( )
348

g ae ha−1

Thifensulfuron4.3717.570.0   64 ( )
55070

Value in parenthesis represents the percentage of Palmer amaranth biotypes.