Physiology of Glyphosate-Resistant and Glyphosate-Susceptible Palmer Amaranth (Amaranthus palmeri) Biotypes Collected from North Carolina

Table 1

Absorption of ¹⁴C-glyphosate as affected by Palmer amaranth biotype and glyphosate overspray^a.

Harvest time	Biotype^b		Glyphosate overspray^c
	Resistant	Susceptible	Not oversprayed	Oversprayed
h	%
6	18^c	30^ab	22^d	25^cd
12	35^a	30^ab	36^ab	29^bcd
24	32^ab	25^bc	26^cd	31^abc
48	32^ab	31^ab	26^cd	36^ab
72	32^ab	33^ab	25^cd	40^a

aAbsorption expressed as percentage of total ¹⁴C recovered. Means within the effect of biotype or glyphosate overspray followed by the same letter are not different according to Fisher’s Protected LSD at 𝑃≤0.05.
^bData pooled over glyphosate overspray options.
^cData pooled over glyphosate-resistant and glyphosate-susceptible biotypes. Glyphosate applied at 840 g/ha.