Response of Herbicide-Resistant Palmer Amaranth (Amaranthus palmeri) Accessions to Drought Stress
Table 3
Percent reduction in height and dry weight of 15 Palmer amaranth accessions at harvest (30 DAE) as affected by the interaction of accession and duration of drought stressa,b.
Accession
County
Resistance
Height
Dry weight
Duration of drought stress (days)
Duration of drought stress (days)
3
5
7
9
3
5
7
9
%
1
Martin
ALSS/GS
3 op
7 k–p
12 g–l
20 b–e
15 g–p
21 f–k
24 d–h
16 g–o
2
Harnett
ALSS/GS
7 k–p
14 e–j
20 b–e
16 c–h
18 f–n
23 d–i
22 e–j
22 e–j
3
Lenoir
ALSS/GS
4 n–p
9 i–o
13 f–k
20 b–e
14 h–q
21 f–k
17 g–o
21 f–k
4
Martin
ALSS/GS
6 l–p
4 n–p
10 h–n
19 b–f
17 g–o
15 g–p
15 g–p
12 j–q
5
Edgecombe
ALSS/GS
10 h–n
8 j–p
9 i–o
24 ab
24 d–h
17 g–o
16 g–o
9 m–q
6
Wayne
GR
11 g–m
8 j–p
11 g–m
22 bc
15 g–p
11 k–q
15 g–p
13 i–q
7
Hoke
GR
7 k–p
16 c–h
11 g–m
22 c
21 f–k
23 d–i
28 c–f
47 a
8
Robeson
GR
3 op
5 m–p
11 g–m
16 c–h
8 n–q
10 l–q
28 c–f
33 b–d
9
Cumberland
GR
3 op
5 m–p
5 m–p
8 j–p
5 pq
10 l–q
13 i–q
21 f–k
10
Scotland
GR
5 m–p
2 p
15 d–i
17 c–g
11 k–q
4 q
25 d–g
33 b–d
11
Robeson
ALSR
9 i–o
8 j–p
12 g–l
21 b–d
16 g–o
16 g–o
19 f–m
38 a–c
12
Johnston
ALSR
8 j–p
7 k–p
11 g–m
25 ab
5 pq
5 pq
16 g–o
38 a–c
13
Robeson
ALSR
5 m–p
7 k–p
8 j–p
17 c–g
15 g–p
19 f–m
32 b–e
39 ab
14
Sampson
ALSR
8 j–p
11 g–m
6 l–p
17 c–g
15 g–p
14 h–q
10 l–q
24 d–h
15
Edgecombe
ALSR
4 n–p
9 i–o
14 e–j
14 e–j
13 i–q
20 f–l
16 g–o
24 d–h
aData are pooled over experiments.
bMeans within a parameter followed by the same letter are not significantly different according to Fisher’s Protected LSD test at .
