Top Tips for Clearfield® Herbicides
Here are a few reminders on how to get the best out of north_east Clearfield ® herbicide, north_east Cleravo ®.
| Cleravo® | Cleranda® | |
|---|---|---|
| Actives | Imazamox 35 g/l + quinmerac 250 g/l | Imazamox 17.5 g/l + metazachlor 375g/l |
| Rate of use | 1.0 l/ha + adjuvant Dash® HC 1.0l /ha | 2.0 l/ha + adjuvant Dash® HC 1.0l /ha |
| Crop timing | From expanded cotyledons to before 9 true leaves | From expanded cotyledons to before 9 true leaves |
| Aquatic buffer zone | None | None |
| Pack size | 5 litres (treats 5 ha of Clearfield® OSR) | 10 litres (treats 5 ha of Clearfield® OSR) |
north_east Click here for the new wHen2g0 Smart tool which provides updated stewardship guidance on metazachlor and quinmerac.
How to get the best weed control
1. Timings
Broad-leaved weeds: Target 1 - 4TL of actively growing weeds - don’t let them get bigger. The below weeds can get away quickly, so we recommend a maximum weed size for application:
- Crane’s-bill spp: 2 true leaves
- Runch: 3 true leaves
- Mayweed spp: 4 true leaves
- Poppy: 4 true leaves
Volunteer Cereals: Target 2-3TL of the cereals (latest is 2 tillers)
With high populations of charlock or runch, it is tempting to wait for all to emerge, but it is better to get the majority at the correct growth stage, both in terms of weed control & protecting yield. At the same time the other weeds are also getting bigger...
2. Application
- 100 litres is OK. Angled nozzles will help if it’s a thick crop; increasing volume will not.
- Medium spray is OK, using flat fan or small droplet air induction nozzles. Not coarse.
- Allow a minimum of 2 hours (if applied to a dry leaf) to become rain-fast.
- Always add Dash® HC 1.0l/ha – it improves leaf cover and uptake.
3. Recommendations
| Expected weeds | Recommendation |
|---|---|
| General BLW, including problem crucifers | Cleravo® 1.0l/ha + Dash® HC 1.0 l/ha OR Cleranda® 2.0l/ha + Dash® HC 1.0l/ha |
| High population of ‘early’ weeds – crane’s-bill, poppy, mayweed. | Either of above options followed by Astrokerb OR Metazachlor 1.0-1.5l/ha pre-em followed by Cleravo® 1.0l/ha + Dash® HC 1.0l/ha |
Remember to avoid mis-application of Cleranda® & Cleravo® to non-Clearfield® varieties. After application wash sprayer tank thoroughly, as per label.
Black-grass activity from Clearfield®?
Cleravo® and Cleranda® will give variable control of black-grass. They should be used in programmes with specific black-grass herbicides e.g. propyzamide, which will also provide good resistance management.
Cleravo® and Dash® HC are registered trademarks of BASF. Cleravo® contains imazamox and quinmerac. Use plant protection products safely. Always read the label and product information before use. For further product information including warning phrases and symbols refer to north_east https://agriculture.basf.com/gb/en. For further information, please do not hesitate to contact your local north_east BASF Agronomy Manager or the BASF Technical Services Hotline: 0845 602 2553.
