Performance of Different Herbicides in Dry-Seeded Rice in Bangladesh

Table 11

Effect of weed control treatments on yield and yield components of rice in the aman season.

Weed control treatments	Panicles; (no. m^−2)	Spikelet panicle^−1	Spikelet fertility (%)	1000-grain weight (g)	Grain yield; (t ha^−1)
Weed-free	253.33	120.20	88.71	17.79	4.98
Partial weedy	172.33	90.28	88.93	17.97	2.59
Oxadiargyl fb ethoxysulfuron	230.00	102.30	91.27	17.55	3.53
Pendimethalin fb ethoxysulfuron	219.67	102.52	88.43	17.74	3.43
Acetachlor + bensulfuranmethyl fb ethoxysulfuron	186.67	100.57	85.44	17.19	3.07
Pyrazosulfuron fb ethoxysulfuron	180.33	95.77	89.53	16.72	3.00
Oxadiargyl fb 1 HW at 35 DAS	236.33	112.68	86.63	18.17	4.08
Pendimethalin fb 1 HW at 35 DAS	230.67	113.63	87.57	18.28	4.05
Acetachlor + bensulfuraonmethyl fb 1 HW at 35 DAS	217.33	110.70	89.99	17.07	3.95
Pyrazosulfuron fb 1 HW at 35 DAS	204.00	107.97	86.29	17.00	3.85
LSD0.05	19.30	10.71	2.55	NS	0.19
𝑃 value	<0.001	0.001	0.002	0.32	<0.001

DAS: days after sowing; fb: followed by; HW: hand weeding; LSD: least significant difference at 5% level of significance; 𝑃: probability.