|
Weed control in no-till
chickpea (Williston-2003)
B-90 chickpeas were seeded
May 25. Individual plots were 10 x 30 ft and replicated three times. PRE and
POST treatments were applied May 28 and June 16, respectively. The primary
weeds evaluated were kochia (Kocz), Russian thistle (Ruth), green foxtail (Grft),
and volunteer wheat (Vwht).
|
|
|
|
Kocz |
Ruth |
Grft |
Vwht |
Yield |
T. W. |
|
Treatmenta |
Rate |
Timing |
Jul 9 |
Aug 26 |
|
|
|
|
———% control ——— |
lb/A |
lb/bu |
|
Roundup + Spartan/
Select |
13 fl oz + 2.67 oz/
5 fl oz |
PRE/
POST |
95 |
100 |
92 |
91 |
1313 |
62.8 |
|
Roundup + Spartan/
Select |
13 fl oz + 4 oz/
5 fl oz |
PRE/
POST |
95 |
100 |
94 |
90 |
1353 |
62.0 |
|
Roundup + Spartan/
Select |
13 fl oz + 5.33 oz/
5 fl oz |
PRE/
POST |
96 |
100 |
95 |
92 |
1486 |
63.0 |
|
Roundup + Balance + Spartan/
Select |
13 fl oz + 2 oz + 4 oz/
5 fl oz |
PRE/
POST |
96 |
100 |
95 |
93 |
1414 |
62.1 |
|
Roundup + Spartan + Sencor/
Select |
13 fl oz + 4 oz + 0.25 lb/
5 fl oz |
PRE/
POST |
95 |
100 |
93 |
93 |
1270 |
63.2 |
|
Roundup + Spartan/
Tough + Select |
13 fl oz + 4 oz/
1.5 pt + 5 fl
oz |
PRE/
POST |
92 |
96 |
91 |
94 |
1517 |
63.3 |
|
Roundup + Spartan/
Sencor + Select |
13 fl oz + 4 oz/
0.167 lb + 5 fl
oz |
PRE/
POST |
95 |
100 |
92 |
92 |
1084 |
61.7 |
|
Untreated |
|
|
0 |
0 |
0 |
0 |
88 |
54.0 |
|
LSD (0.05) |
|
|
4 |
2 |
3 |
1 |
222 |
1.2 |
|
CV |
|
|
2 |
1 |
2 |
3 |
11 |
1.1 |
aRoundup
treatments were Roundup UltraMax applied with AMS at 2.5 gal/100 gal, and Select
treatments were applied with COC at 1% v/v.
Herbicide treatments
included Spartan alone, Spartan tank mixed with Balance or Sencor, or Spartan
followed postemergence by Tough or Sencor. All PRE treatments were tank mixed
with Roundup UltraMax. None of the treatments caused visible crop injury.
Previous studies have shown Sencor applied postemergence to cause slight to
moderate crop injury. Sencor applied postemergence is not a labeled treatment.
All treatments provided
excellent control of kochia, Russian thistle, green foxtail, and volunteer
wheat.
| 