Performance of Different Herbicides in Dry-Seeded Rice in Bangladesh
Table 2
Effect of weed control treatments on weed density (number m−2) at 35 DAS in the boro season. Weed density data were subjected to square-root transformation before analysis; original values are shown in parentheses.
Weed control treatments
Amaranthus spinosus
Celosia argentea
Cleome rutidosperma
Cyperus rotundus
Cynodon dactylon
Echinochloa colona
Total weed density
Partial weedy
5.44 (29.2)
9.06 (85.4)
6.22 (38.5)
8.86 (79.0)
3.83 (14.6)
8.77 (79.2)
18.00 (325.8)
Oxadiargyl fb ethoxysulfuron
0.71 (0.0)
0.71 (0.0)
0.71 (0.0)
5.32 (28.1)
2.55 (6.3)
2.56 (8.3)
6.50 (42.7)
Pendimethalin fb ethoxysulfuron
0.71 (0.0)
4.26 (17.7)
0.71 (0.0)
6.07 (36.5)
2.15 (5.2)
1.97 (4.2)
7.97 (63.5)
Acetachlor + bensulfuranmethyl fb ethoxysulfuron
0.71 (0.0)
5.63 (31.3)
4.56 (20.8)
6.90 (47.9)
1.74 (3.1)
1.97 (4.2)
10.36 (107.3)
Pyrazosulfuron fb ethoxysulfuron
0.71 (0.0)
5.09 (26.0)
0.71 (0.0)
6.09 (37.5)
1.93 (6.3)
5.62 (31.3)
10.07 (101.0)
Oxadiargyl fb 1 HW at 35 DAS
0.71 (0.0)
0.71 (0.0)
0.71 (0.0)
7.90 (63.5)
1.93 (6.3)
0.71 (0.0)
8.30 (69.8)
Pendimethalin fb 1 HW at 35 DAS
0.71 (0.0)
5.24 (27.1)
0.71 (0.0)
9.40 (89.2)
1.52 (3.1)
0.71 (0.0)
10.93 (119.4)
Acetachlor + bensulfuraonmethyl fb 1 HW at 35 DAS
3.72 (13.5)
5.82 (33.3)
3.53 (12.5)
7.07 (50.0)
1.51 (2.1)
3.71 (13.5)
11.20 (125.0)
Pyrazosulfuron fb 1 HW at 35 DAS
3.67 (13.5)
6.14 (37.5)
0.71 (0.0)
7.54 (57.3)
3.96 (15.6)
7.47 (58.3)
13.42 (182.3)
LSD0.05
0.70
1.65
0.90
2.03
NS
2.14
2.08
value
<0.001
<0.001
<0.001
0.009
0.20
<0.001
<0.001
DAS: days after sowing; fb: followed by; HW: hand weeding; LSD: least significant difference at 5% level of significance; : probability.
