|
Volunteer canola
control in corn (2004)
Corn was seeded May 18
into 30-inch rows. Canola was seeded over the top to simulate a volunteer
canola (VC) situation. Individual plots were 10 x 30 ft and replicated 3
times. Herbicide treatments were applied preemergence (PRE), 3-leaf canola, and
6-leaf canola on May 18, June 18, and June 28, respectively.
In corn, soil-applied
Balance Pro provided excellent VC control. Postemergence herbicides Steadfast,
Accent, and Option provided excellent VC control at both application timings.
VC control with Callisto and and Distinct dropped 12-13% with the 6-leaf
application, while control with 2,4-D amine dropped 43%. Atrazine and Starane
provided very little control at either application stage. We conducted a
follow-up study in the fall and found that Starane caused 20-50% injury applied
at 0.33-0.67 pt. We are not sure why Starane caused little injury in the first
study.
|
|
|
|
Volunteer canola |
|
Treatment |
Rate |
Timing |
Jul 8 |
Jul 28 |
|
|
|
|
—— % control —— |
|
Untreated |
|
|
0 |
0 |
|
Balance Pro |
3 fl oz |
PRE |
99 |
98 |
|
Steadfast + MSO + 28% N |
0.75 oz + 1% v/v + 2 qt |
3-leaf |
99 |
100 |
|
Steadfast + MSO + 28% N |
0.75 oz + 1% v/v + 2 qt |
6-leaf |
76 |
99 |
|
Accent + MSO + 28% N |
0.5 oz + 1% v/v + 1 qt |
3-leaf |
98 |
99 |
|
Accent + MSO + 28% N |
0.5 oz + 1% v/v + 1 qt |
6-leaf |
81 |
98 |
|
Option + MSO + 28% N |
1.5 oz + 1.5 pt + 1.5 qt |
3-leaf |
99 |
100 |
|
Option + MSO + 28% N |
1.5 oz + 1.5 pt + 1.5 qt |
6-leaf |
71 |
98 |
|
Atrazine + COC |
0.25 lb ai + 1 qt |
3-leaf |
31 |
10 |
|
Atrazine + COC |
0.25 lb ai + 1 qt |
6-leaf |
24 |
12 |
|
2,4-D amine |
0.5 pt |
3-leaf |
88 |
87 |
|
2,4-D amine |
0.5 pt |
6-leaf |
20 |
34 |
|
Callisto + COC + 28% N |
3 fl oz + 1% v/v + 2.5% v/v |
3-leaf |
99 |
99 |
|
Callisto + COC + 28% N |
3 fl oz + 1% v/v + 2.5% v/v |
6-leaf |
62 |
86 |
|
Starane |
0.5 pt |
3-leaf |
0 |
0 |
|
Starane |
0.5 pt |
6-leaf |
20 |
0 |
|
Distinct + NIS + 28% |
4 oz + 0.25% v/v + 1.25% v/v |
3-leaf |
83 |
88 |
|
Distinct + NIS + 28% |
4 oz + 0.25% v/v + 1.25% v/v |
6-leaf |
58 |
70 |
|
LSD (0.05) |
|
|
11 |
13 |
|
CV |
|
|
11 |
12 |
|
