Distribution of Glyphosate- and Thifensulfuron-Resistant Palmer Amaranth (Amaranthus palmeri) in North Carolina

Table 2

Percentage of biotypes expressing lower mortality and less visible control than a known susceptible biotype for each rate of glyphosate and thifensulfuron based on Dunnett’s Procedure (𝑃≤0.05).

Herbicide	Rate; (g ha^−1)	Mortality				Visible control
		Percentage of biotypes	𝐹 value	𝑃>𝐹	CV (%)	Percentage of biotypes	𝐹 value	𝑃>𝐹	CV (%)
Thifensulfuron	4.37	15	2.18	≤0.0001	95.2	25	7.73	≤0.0001	24.6
Thifensulfuron	17.5	30	3.00	≤0.0001	58.8	29	8.22	≤0.0001	19.8
Thifensulfuron	70	36	5.05	≤0.0001	52.5	30	12.54	≤0.0001	17.7
Glyphosate	280	78	6.54	≤0.0001	85.5	60	12.39	≤0.0001	57.8
Glyphosate	560	91	7.93	≤0.0001	92.3	76	6.74	≤0.0001	72.5
Glyphosate	840	95	11.49	≤0.0001	95.4	87	7.91	≤0.0001	77.3