Visible control^b (%)

8 WAA

Treatment

Rate

(g ai/ae ha⁻¹)

App.

Timing

2 WAA

4 WAA

8 WAA

12 WAA

Waterhemp

density

(plants m⁻²)

Waterhemp biomass (g・m⁻²)

Soybean grain yield

(t・ha⁻¹)

Weedy control

0

0

0

0

270.0a

288.5a

1.0c

Weed-free control

100

100

100

100

0

0

1.9ab

Pyroxasulfone

150

PRE

86d

85c

71e

51e

10.5d

26.2bc

1.5abc

S-metolachlor/metribuzin

1943

PRE

90bcd

94bc

85cde

75cd

4.0de

18.6bc

1.6ab

Pyroxasulfone/sulfentrazone

300

PRE

90bcd

92bc

82de

69de

4.2de

19.8bc

1.6ab

Pyroxasulfone/flumioxazin

240

PRE

91bcd

95b

90bcd

85bcd

1.8ef

10.5cd

1.3bc

Glyphosate/dicamba

1800

EPOST

85d

86c

77de

71de

30.3c

21.3bc

1.4abc

Glyphosate/dicamba

1800

LPOST

23e

65d

79de

69de

84.9b

61.1b

1.4bc

Glyphosate/dicamba fb

Glyphosate/dicamba

1800

1800

EPOST fb LPOST

89cd

97ab

95abc

91abc

4.9de

3.1edf

1.6ab

Pyroxasulfone fb

Glyphosate/dicamba

150

1800

PRE fb

LPOST

91bcd

97ab

96ab

93ab

3.5e

4.2de

1.6ab

S-metolachlor/metribuzin fb

Glyphosate/dicamba

1943

1800

PRE fb

LPOST

99a

99a

99a

97ab

0.3f

0.2f

2.0a

Pyroxasulfone/sulfentrazone fb

Glyphosate/dicamba

300

1800

PRE fb

LPOST

97abc

99a

99a

97ab

0.6f

0.6ef

1.8ab

Pyroxasulfone/flumioxazin fb

Glyphosate/dicamba

240

1800

PRE fb

LPOST

98ab

99a

99a

98a

0.3f

0.8ef

1.8ab