Cover crop

Herbicide

%

%

b

ED₅₀

g a.i. ha^-1

ED₈₅

g a.i. ha^-1

None

Ioxynil

+bromoxynil

25

100

(67-133)

1

(0-3)

2.4

(1.4-3.5)

47.6

(26.8-68.4)

98.1

(69.0-127.2)

None

Tribenuron

-methyl

0

100

(55-145)

7

(4-11)

1.4

(0.6-2.2)

0.20

(0.03-0.36)

0.66

(0.29-1.03)

Barley

dense

Tribenuron

-methyl

-25

100

(54-146)

13

(7-19)

1.2

(0.3-2.0)

0.22

(-0.02-0.47)

0.97

(0.22-1.72)

Barley

normal

Tribenuron

-methyl

0

100

(60-140)

8

(5-11)

1.4

(0.5-2.3)

0.16

(0.02-0.29)

0.53

(0.25-0.82)

Wheat

dense

Tribenuron

-methyl

0

100

(37-164)

10

(-3-24)

1.0

(-0.3-2.4)

0.23

(-0.17-0.63)

1.28

(-0.71-3.28)

Wheat

normal

Tribenuron

-methyl

0

100

(53-147)

6

(3-8)

1.4

(0.4-2.4)

0.13

(0-0.26)

0.44

(0.19-0.70)