Rice Tolerance to Saflufenacil in Clomazone Weed Control Program

Table 4

Visible rice (Oryza sativa L.) injury at 3, 8, 18, and 24 days after application (DAA) in response to postemergence application (4- to 6-leaf stage, V4-V6) of saflufenacil following preemergence application of clomazone. Data represents an interaction between rates of saflufenacil and clomazone for experiment conducted in 2009.

Saflufenacil rates (g ha^−1)

Visual injury^a

3 DAA

8 DAA

18 DAA

24 DAA

Clomazone rates (g ha^−1)

Clomazone rates (g ha^−1)

Clomazone rates (g ha^−1)

Clomazone rates (g ha^−1)

0^b

392

505

0

392

505

0

392

505

0

392

505

%

0

5 b^c

1 d

3 d

4 b

0 c

1 d

0^d

0 b

0 b

0^d

0 b

0 c

12.5

11 ab

11 c

13 c

10 ab

6 b

8 c

0

0 b

0 b

0

1 b

0 c

18.75

13 ab

25 b

16 c

8 ab

15 b

11 c

6

3 b

0 b

4

5 a

1 bc

25

13 ab

24 bc

35 b

10 ab

15 b

25 b

6

3 b

4 a

4

1 b

5 ab

50

18 a

50 a

68 a

15 a

43 a

46 a

4

14 a

11 a

3

9 a

8 a

^aInjury was estimated visually using a scale of 0 to 100% where 0 = no rice injury and 100 = rice death. ^bPlots that did not receive clomazone were treated with propanil plus quinclorac. ^cMeans followed by a different letter within a column are significantly different according to the Tukey’s test (P ≤ 0.05). ^dMeans were not different according to F-test at P ≤ 0.05.