Control of Echinochloa sp. in the Irrigated Rice Crop
Table 1
Percentage control Echinochloa sp. (barnyardgrass) in irrigated rice, due to periods of flooding, application times, and doses of penoxsulam, Rio Grande, RS, Brazil.
Dose (g·ha−1)
Beginning of irrigation
Application time
Premature
Late
Premature
Late
Premature
Late
Premature
Late
10 DAT1
20 DAT
30 DAT
81 DAT
65 DAT
0
1 DAT
0 Aa2
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
15 DAT
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
30 DAT
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
0 Aa
24
1 DAT
98 Aa
78 Ab
100 Aa
88 Ab
100 Aa
98 Aa
100 Aa
98 Aa
15 DAT
75 Ba
64 Ba
81 Ba
85 Aa
91 Ba
92 Aa
98 ABa
98 Aa
30 DAT
72 Ba
60 Bb
68 Cb
75 Ba
78 Cb
86 Ba
96 Ba
94 Bb
36
1 DAT
98 Aa
84 Ab
100 Aa
91 Ab
100 Aa
99 Aa
100 Aa
99 Aa
15 DAT
86 Aa
68 Bb
85 Ba
90 Aa
99 Aa
98 Aa
100 Aa
99 Aa
30 DAT
88 Aa
71 ABb
86 Ba
83 Aa
91 Ba
94 Aa
98 Aa
96 Ba
48
1 DAT
99 Aa
91 Aa
100 Aa
95 Aa
100 Aa
100 Aa
100 Aa
99 Aa
15 DAT
88 Aa
71 Bb
93 ABa
92 Aa
99 Aa
98 Aa
100 Aa
99 Aa
30 DAT
87 Aa
75 Bb
91 Ba
88 Aa
95 Aa
95 Aa
99 Aa
97 Aa
60
1 DAT
99 Aa
93 Aa
100 Aa
96 Aa
100 Aa
100 Aa
100 Aa
100 Aa
15 DAT
96 Aa
80 Ab
98 Aa
96 Aa
100 Aa
99 Aa
100 Aa
100 Aa
30 DAT
95 Aa
81 Ab
92 Aa
90 Aa
97 Aa
97 Aa
99 Aa
99 Aa
Days after treatment application.2Means followed by the same capital letters in the column in each application time compare times of early irrigation within dose and followed by the same lowercase line, compare application time within herbicide and times start of irrigation, and do not differ by Tukey’s test ().