Performance of Different Herbicides in Dry-Seeded Rice in Bangladesh

Table 1

Effect of weed control treatments on weed density (number m⁻²) at 20 DAS (before application of post-emergence herbicide). Weed density data were subjected to square-root ([𝑥+0.5]) transformation before analysis; original values are shown in parentheses.

Weed control treatments	Grasses	Broadleaf	Sedges	Total
Partial weedy	13.68 (187.5)	15.41 (238.5)	10.10 (102.1)	22.98 (528.1)
Oxadiargyl	6.80 (45.8)	8.98 (80.2)	5.62 (31.3)	12.56 (157.3)
Pendimethalin	5.04 (25.0)	12.31 (151.0)	9.15 (83.9)	16.13 (259.9)
Acetachlor + bensulfuranmethyl	6.75 (45.3)	9.41 (88.5)	6.90 (47.4)	13.48 (181.2)
Pyrazosulfuron	13.00 (168.8)	8.46 (71.4)	5.97 (35.4)	16.62 (275.6)
LSD0.05	1.29	1.64	1.55	1.39
𝑃 value	<0.001	<0.001	0.001	<0.001

DAS: days after sowing; LSD: least significant difference at 5% level of significance; 𝑃: probability.