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Volunteer canola and
flax control in dry pea (2003)
Majoret dry peas were
seeded April 29 at 160 lb/A. Canola and flax were seeded immediately following
the peas to simulate a volunteer situation. Individual plots were 10 x 30 ft
and replicated three times. PRE and POST treatments were applied May 1 and May
31, respectively. Select was applied over the entire study to control grass
weeds three hours after the POST treatment on May 31. Volunteer canola and flax
control were evaluated. Dry peas were harvested Aug 1.
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|
|
|
Vol. Canola |
Vol. Flax |
Dry pea |
|
Treatmenta |
Rate |
Timing |
Jun 20 |
Jul 21 |
Jun 20 |
Jul 21 |
Jun 20 |
Jul 21 |
Yield |
Test wt. |
|
|
|
|
————% control ———— |
—% injury — |
lb/A |
lb/bu |
|
Sencor |
0.25 lb |
PRE |
91 |
93 |
68 |
56 |
0 |
0 |
2152 |
65.1 |
|
Sencor |
0.375 lb |
PRE |
98 |
100 |
87 |
84 |
0 |
0 |
2396 |
65.5 |
|
Sencor |
0.5 lb |
PRE |
100 |
100 |
94 |
93 |
2 |
1 |
2440 |
65.3 |
|
Spartan +
Pursuit |
4 oz+
1 fl oz |
PRE |
94 |
99 |
71 |
79 |
0 |
0 |
2380 |
65.5 |
|
Spartan |
4 oz |
PRE |
44 |
73 |
0 |
2 |
0 |
0 |
1535 |
65.2 |
|
Pursuit |
1 fl oz |
PRE |
81 |
92 |
59 |
84 |
0 |
0 |
2078 |
65.6 |
|
Sencor |
0.083 lb |
POST |
72 |
78 |
32 |
12 |
0 |
0 |
1590 |
65.5 |
|
Sencor |
0.167 lb |
POST |
94 |
97 |
43 |
21 |
0 |
0 |
1984 |
65.5 |
|
Sencor |
0.25 lb |
POST |
98 |
99 |
82 |
72 |
8 |
5 |
2321 |
65.6 |
|
Raptor +
Basagran |
2 fl oz +
1 pt |
POST |
100 |
100 |
5 |
2 |
0 |
2 |
1717 |
65.7 |
|
Basagran |
2 pt |
POST |
100 |
100 |
4 |
2 |
3 |
0 |
1382 |
65.6 |
|
Ultra Blazer |
0.75 pt |
POST |
98 |
98 |
99 |
96 |
18 |
8 |
2308 |
64.9 |
|
MCPA amine |
4 fl oz |
POST |
78 |
82 |
7 |
5 |
6 |
0 |
1350 |
65.6 |
|
Untreated |
|
|
0 |
0 |
0 |
0 |
0 |
0 |
1055 |
65.2 |
|
LSD (0.05) |
|
|
14 |
8 |
10 |
15 |
5 |
3 |
715 |
NS |
|
CV |
|
|
10 |
5 |
13 |
20 |
107 |
131 |
22 |
0.5 |
aBasagran was
applied with 1% v/v COC, and Ultra Blazer was applied with 0.25% v/v NIS on June
5.
Volunteer canola
population was variable due to flea beetle pressure early in the season. Most
treatments provided excellent volunteer canola control by the July 21
evaluation. Spartan alone, and Sencor at 0.083 lb POST provided only fair
volunteer canola control and MCPA amine provided good control. Ultra Blazer and
Sencor applied PRE at 0.5 lb provided the best volunteer flax control at 96, and
93%, respectively, at the July 21 evaluation. Although Ultra Blazer caused
significant visible dry pea injury, especially at the June 20 evaluation, dry
peas treated with Ultra Blazer yielded very well compared to other treatments.
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