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Volunteer control in cereals
Volunteer control throughout the rotation is an important consideration on farm. Not only will volunteers compete with the crop for yield and crop nutrition, but they also shade weeds from herbicides, act as hosts for pest and diseases, and potentially cause quality issues at harvest.
Weather conditions at harvest and cultivation techniques can severely affect the likelihood of bean, pea and cereal volunteers germinating in the following crop.
The table below indicates the efficacy of Corteva herbicides against common volunteer species. This information is based on limited or anecdotal information in some cases and assumes good growing conditions and active growth.
Please check the individual product labels for appropriate application timings.
| Weed | Broadway Star + Adj | Broadway Ultra + adj | Pixxaro | Pixxaro | Spitfire/Nevada | Starane Hi-Load | Starane XL | Zypar | Zypar |
| Rate | 265 g/ha | 100 g/ha | 0.375 l/ha | 0.5 l/ha | 1 l/ha | 0.6 /ha | 1.85 l/ha | 0.75 l/ha | 1 l/ha |
| Beans | BFBV | S up to 8 TL | 8 TL | 15cm | 8 TL† | x | 6TL | 8TL | Before Flowering |
| Borage | 4 TL | S up tp 2 TL | - | 2 TL | 6 TL | 4 TL | 4TL | MS 4TL | 4TL |
| Linseed | 6 TL | MS | 5cm | 10cm | 8cm | BFBV | 10cm | 8cm | 8cm |
| OSR1 | 8 TL | S up to 6 TL | x | x | BFBV | x | 10cm | Before Flowering | Before Flowering |
| Peas | BFBV | S up to 8 TL | 8 TL | 15cm | 8 TL† | x | 6 TL | 8 TL | Before Flowering |
| Potatoes | - | - | - | MS <20cm‡ | MS 4TL | S if + Harmony M SX | MS 2TL | x | MS 10cm |
| Sugar Beet (from seed) | 4 TL | S up tp 4 TLx | x | x | 6 TL | - | 4 TL | 4 TL | 6 TL |
Key: TL – True Leaves, BFBV – Before flower buds visible, S – Susceptible, MS – Moderately Susceptible.
† efficacy can be reduced if peas and beans are heavily waxed, the addition of an adjuvant, if approved, may be advantageous
1 Does not include Clearfield varieties
‡ Control will be improved by the addition of a Sulfonyl urea herbicide
X = DOES NOT CONTROL
- No data