Objective:
To evaluate the efficacy of Dual II containing products for weed control in peas.
Materials and Methods:
Seven herbicide treatments were evaluated for weed control and crop safety in peas. The experimental design was a randomized complete block with three replications. The herbicidetreatments were applied preplant and then double incorporated with a field cultivator on AprilHi-line peas were planted on six inch row spacings, to a depth of three inches on April 21, ata rate of 220 lb/A. Foxtail, canola, wild buckwheat and common lambsquarters were seeded inthe center of each plot on April 21.
Results:
No crop injury was observed. The most complete weed control was observed with Pursuit plus Prowl. The other treatments failed to provide adequate control of volunteer canola, which was the main weed present. Yield differences were significant at the 10% level of significance.
Summary:
Overall, the products containing Dual II did not perform as well as Pursuit plus Prowl H2O.
Table 1. Materials and Methods. |
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|---|---|---|---|
| Seeding Date: | 4/21/2016 | Harvest Date: | 8/17/2016 |
| Julian Date: | 112 | Julian Date: | 230 |
| Seeding Rate: | 220 lb/A | Soil Type: | Creston SiL |
| Previous Crop: | Barley | Soil Test: | 116-22-250-46 |
| Tillage: | Conventional | Fertilizer: | BC: 6-30-30 |
Table 2. Effect of herbicides on weed control in peas |
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|---|---|---|---|---|---|---|---|---|
| Treatment | Rate | Percent Weed Control | YLD¹ | TWT¹ | ||||
| BRARA | AMARE | THLAR | CHEAL | bu/ac | lb/bu | |||
| Check | 0.0 | 0.0 | 0.0 | 0.0 | 33.9 | 64.1 | ||
| Broadaxe XC | 19 | fl oz/a | 23.3 | 95.0 | 94.3 | 96.0 | 61.1 | 64.5 |
| Broadaxe XC + | 10 | fl oz/a | 0.0 | 95.0 | 93.3 | 95.0 | 42.9 | 65.4 |
| Dual II | 8 | fl oz/a | ||||||
| Broadaxe XC | 26 | fl oz/a | 16.7 | 93.3 | 95.0 | 95.0 | 52.4 | 64.7 |
| Broadaxe XC + | 10 | fl oz/a | 0.0 | 95.0 | 93.3 | 95.0 | 53.9 | 64.8 |
| Dual II | 13 | fl oz/a | ||||||
| Dual II | 16 | fl oz/a | 0.0 | 95.0 | 88.3 | 95.0 | 37.6 | 64.5 |
| Dual II | 30 | fl oz/a | 0.0 | 85.0 | 86.7 | 95.0 | 37.0 | 64.7 |
| Pursuit + | 3 | fl oz/a | 75.0 | 96.0 | 96.0 | 96.0 | 87.7 | 63.5 |
| Prowl H2O | 2 | pt/a | ||||||
| Mean | 14.4 | 81.8 | 80.9 | 83.4 | 50.8 | 64.5 | ||
| CV | 107.2 | 6.0 | 4.2 | 1.0 | 37.2 | 0.9 | ||
| LSD | 27.0 | 8.6 | 6.0 | 1.4 | 33.1 | 1.0 | ||
| Pr>F | 0.0004 | 0.0001 | 0.0001 | 0.0001 | 0.0584 | 0.0484 | ||
| BRARA: canola, AMARE: redroot pigweed, THLAR: field pennycress, CHEAL: common lambsquarters, YLD: yield, TWT: test weight. | ||||||||
| ¹adjusted to 13% moisture | ||||||||