Herbicide treatment

Rate

Visible Control

Density

Biomass

Maize grain yield

2 WAA

4 WAA

8 WAA

12 WAA

g ai ha−1

------------------------------- % -------------------------------

Plants m−2

g·m−2

kg·ha−1

Tolpyralate

30

78 a

91 ab

96 a

98 a

2 ab

1 ab

10,500 a

Tolpyralate + atrazine

30 + 1000

94 a

98 a

99 a

99 a

0 a

0 a

10,100 a

Mesotrione + atrazine

100 + 280

90 a

93 ab

95 a

98 a

2 ab

1 ab

10,400 a

Dicamba/atrazine

500/1000

65 a

80 b

88 a

91 b

8 b

8 b

9500 a

Non-treated control

0

-

-

-

-

96 c

99 c

9100 a

Weed-free control

n/a

-

-

-

-

-

-

10,400 a