Visible Control

Herbicide treatment^a

Rate

2 WAA

4 WAA

8 WAA

12 WAA

Density

Biomass

Corn grain yield

g ai ha⁻¹

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

Plants m⁻²

g·m⁻²

kg·ha⁻¹

Tolpyralate

30

66 ab

60 a

60 a

61 a

274 ab

81 ab

8200 a

Tolpyralate + atrazine

30 + 1000

78 a

72 a

69 a

71 a

129 a

76 a

8600 a

Mesotrione + atrazine

100 + 280

79 a

75 a

77 a

78 a

143 ab

55 a

8600 a

Dicamba/atrazine

500/1000

60 b

69 a

71 a

74 a

140 ab

70 a

9200 a

Non-treated control

0

-

-

-

-

714 b

360 b

4500 b

Weed-free control

n/a

-

-

-

-

-

-

10,300 a