Evaluation of Quizalofop-Resistant Rice for Arkansas Rice Production Systems
Table 1
Effect of ACCase-inhibiting herbicide and growth stage at time of application for control of barnyardgrass, broadleaf signalgrass, fall panicum, and Amazon sprangletop at 21 DAT.
Growth stage
Herbicide
Rate
Control
ECHCG
BRAPP
PANDI
LEFPA
g ai ha−1
%
2- to 3-leaf
Quizalofop
80
100 a
99 a
100 a
100 a
Quizalofop
120
100 a
100 a
100 a
100 a
Quizalofop
160
100 a
100 a
100 a
100 a
Fenoxaprop
122
96 ab
99 a
100 a
99 a
Cyhalofop
313
96 ab
98 a
100 a
98 ab
5- to 6-leaf
Quizalofop
80
91 bc
100 a
99 a
96 b
Quizalofop
120
97 a
100 a
100 a
100 a
Quizalofop
160
99 a
100 a
100 a
100 a
Fenoxaprop
122
89 c
85 b
76 c
85 c
Cyhalofop
313
48 d
56 d
39 d
44 g
12- to 16-leaf
Quizalofop
80
36 e
54 d
92 b
70 e
Quizalofop
120
40 e
64 c
90 b
73 e
Quizalofop
160
53 d
86 b
95 ab
80 d
Fenoxaprop
122
27 f
33 f
75 c
61 f
Cyhalofop
313
19 g
47 e
29 e
38 h
DAT: days after treatment, ECHCG: barnyardgrass, BRAPP: broadleaf signalgrass, PANDI: fall panicum, LEFPA: Amazon sprangletop. Means within a column followed by the same letter are not different according to Fisher’s LSD ().
