Regression parametersa (±SE)

Predicted tolpyralate + atrazine dose

Variable

a

b

c

ED50

ED80

ED95

Control

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

------------------- g ai ha−1 ------------------

2 WAA

95 (2.7)

26 (3.3)

-

4 + 136

20 + 671

Non-est.

4 WAA

89 (2.9)

24 (3.5)

-

5 + 157

32 + 1077

Non-est.

8 WAA

91 (3.4)

20 (3)

-

6 + 186

33 + 1112

Non-est.

12 WAA

92 (3.5)

23 (3.7)

-

5 + 160

28 + 915

Non-est.

---------- Plants m−2 ----------

Density

99 (46.9)

634 (100.2)

0.25 (0.1)

3 + 113

10 + 339

Non-est.

------------- g·m−2 -------------

Biomass

41 (14.6)

325 (31.5)

0.27 (0.06)

3 + 104

9 + 292

Non-est.

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

Grain yield

88 (4.3)

109 (65.9)

-

1 + 35

8 + 263

Non-est.