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Oilseed rape is an integral part of the UK arable rotation, but it’s not without its risks and challenges. Corteva is committed to supporting farmers and agronomists to grow oilseed rape successfully.
This online hub will support you through the season. Bookmark this page and visit regularly for updates.
Why Belkar® and Astrokerb® in the programme makes sense for established oilseed rape
A successful oilseed rape crop is built right from the beginning. Once plants have emerged and begun to grow, protecting that investment becomes the priority. The herbicide strategy plays a very key role. Every weed competing with the crop for moisture, light, nutrients and space can reduce vigour, slow canopy development and ultimately impact yield potential.
That's why a programme approach to weed control is often the most effective strategy.
Belkar® provides the flexibility to assess crop growth and actual weed pressure before making treatment decisions. Applied from 1 September, it targets a wide range of competitive broad-leaved weeds including cleavers, cranesbill, fumitory, mayweed and poppies, helping remove competition at a time when young crops need every advantage. Controlling weeds early allows oilseed rape to establish more rapidly, make better use of available moisture and nutrients, and build biomass ahead of winter.
Following with Astrokerb® later in the autumn completes the programme by delivering reliable grassweed control alongside additional broad-leaved weed activity. This two-step approach enables growers to match inputs to field conditions, tackle weeds when they are most vulnerable and maintain crop competitiveness throughout the establishment period.
In a season where many crops may be drilled later and establishment is being driven by conditions rather than calendar dates, a Belkar followed by Astrokerb programme provides the flexibility, performance and reassurance needed to maximise the potential of every hectare of oilseed rape.
Further reading and resources
OSR out the ground? Now is the time to protect your investment. Explore the latest advice on managing weed competition, integrating companion crops and building a flexible herbicide programme with Belkar®, Astrokerb® and new LaDiva® to maximise crop competitiveness and yield potential.
- Article: Oilseed rape establishment and weed control in 2026
- September e-newletter: "OSR Agronomy Update" (here).
Herbicide product page quick links:
Videos: Getting OSR off to the best possible start: Hugh Guinan's autumn advice. Watch our two videos below to learn more.
Belkar + Astrokerb: The Backbone of Autumn OSR Weed Control
In this video, Corteva's Field Technical Manager, Hugh Guinan, explains why it’s important to maintain momentum with your autumn herbicide programme in oilseed rape. With one of the largest OSR crop areas drilled in recent years and crops responding
Belkar + Astrokerb: The Backbone of Autumn OSR Weed Control
In this video, Corteva's Field Technical Manager, Hugh Guinan, explains why it’s important to maintain momentum with your autumn herbicide programme in oilseed rape. With one of the largest OSR crop areas drilled in recent years and crops responding
Getting OSR Off to the Best Possible Start: Hugh Guinan's Autumn Advice
Growing oilseed rape? Give your crop the best chance of a strong, competitive start. A flexible post-emergence approach to weed control can help minimise early competition, support establishment and protect yield potential this autumn. https://www.c
Getting OSR Off to the Best Possible Start: Hugh Guinan's Autumn Advice
Growing oilseed rape? Give your crop the best chance of a strong, competitive start. A flexible post-emergence approach to weed control can help minimise early competition, support establishment and protect yield potential this autumn. https://www.c
OSR establishment: Why conditions matter more than calendar date
Key factors behind successful oilseed rape establishment and why a condition-led approach could make all the difference
OSR establishment: Why conditions matter more than calendar date
Key factors behind successful oilseed rape establishment and why a condition-led approach could make all the difference
Oilseed rape product highlights
Maximise your oilseed rape crop potential
Product and agronomy video resources
Belkar + Astrokerb: The Backbone of Autumn OSR Weed Control
In this video, Corteva's Field Technical Manager, Hugh Guinan, explains why it’s important to maintain momentum with your autumn herbicide programme in oilseed rape. With one of the largest OSR crop areas drilled in recent years and crops responding
Belkar + Astrokerb: The Backbone of Autumn OSR Weed Control
In this video, Corteva's Field Technical Manager, Hugh Guinan, explains why it’s important to maintain momentum with your autumn herbicide programme in oilseed rape. With one of the largest OSR crop areas drilled in recent years and crops responding
Important stewardship considerations if you are planning to grow oilseed rape
Important stewardship considerations if you are planning to grow oilseed rape
Propyzamide - Back to Basics
Propyzamide - Back to Basics
Korvetto herbicide overview
Korvetto herbicide overview
Key weeds to watch out for in OSR
Explore the weed biology section of our website to learn more about weeds and how you can control them.
Disease management in oilseed rape
Explore our disease management section of our website to learn more.
