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Helping you to maximise your potato yield
Our expanding range of solutions includes:
Zorvec Entecta™, the fungicide containing the renowned Zorvec™ active, Option® fungicide (cymoxanil), the herbicide Titus®, and biostimulant BlueN™.
Our expanding range of solutions includes:
Zorvec Entecta™, the fungicide containing the renowned Zorvec™ active, Option® fungicide (cymoxanil), the herbicide Titus®, and biostimulant BlueN™.
- Programme approach
- Fungicide solutions
- 2026 Application advice
- Herbicide solutions
- Biostimulant solutions
- CPD Quiz
- Follow the crop 2026
- Contact details
Fungicide solutions
Zorvec™ active
Zorvec active is the first active ingredient of its kind — a member of a novel class of fungicides that control diseases caused by oomycetes acting at a unique site within the pathogen. Inside the plant it moves systemically to protect new growth as it emerges and develops.
Key benefits:
- Unique site of activity: contains FRAC Group 49 chemistry.
- Outstanding efficacy: offers robust control on a 7-day spray interval, even during rapid growth phase of crop.
- Systemic activity: systemic movement of Zorvec active enables uniform protection even for portions of leaves receiving partial spray coverage.
See below for Zorvec containing products available to UK growers.
Zorvec Entecta™
Zorvec Entecta utilises the renowned Zorvec active formulation to deliver the most flexible Late Blight control.
Formulation: Suspo-emulsion (SE) containing 240g/l amisulbrom + 48g/l oxathiapiprolin - Group 21 + 49 Fungicides respectively.
Recommended rate: 0.25L/ha
Option®
Option contains cymoxanil which has been the backbone of the UK blight programme for many years and continues to provide invaluable curative activity: up to 2 days kickback. It can be combined with other AI's at any stage of the blight programme, right up to harvest with its 1-day pre-harvest interval. Cymoxanil (Group 27) offers an alternative MoA in addition to curative activity as part of an anti-resistance strategy in mixture with a fungicide partner. This is of particular value for single AI products.
Formulation: Water dispersible granule containing 600g/kg cymoxanil.
Key benefits:
- Option contains cymoxanil, which is locally systemic and offers both preventative and curative control.
- It must only be applied in tank-mixture with specified formulations of partner blight materials.
- By using Option as a mixing partner, this will support an anti-resistance strategy reducing the selection and build-up of resistant strains of fungi.
Zorvec active best practice application advice for 2026
Visit the Zorvec stewardship hub to read the full best practice application advice for the 2026 season.
Herbicide solutions
Titus®
Titus is the mainstay of early season post emergence weed control in potatoes. Typically applied when weeds break through residual programmes or germinate late. Best control is achieved when weeds are small and actively growing (between 2-4 true leaves). Titus has activity on a wide range of difficult broad-leaved weeds, such as cleavers, chickweed, redshank, mayweed, brassica weeds and volunteer oilseed rape. It also has some excellent activity on some grasses, notably couch.
Formulation: 250 g/kg rimsulfuron
Application timing: in the spring pre-emergence of the crop up until the crop is 25 cm high. Best control is achieved when weeds are small and actively growing (cotyledon to 2 true leaves).
Application method: Sprayer
Key benefits:
- Suitable for use on all potato varieties excluding seed crops.
- Broad spectrum of activity including difficult broad-leaved weeds and grasses.
- It can be tank-mixed with metribuzin (on metribuzin tolerant varieties only), for improved control of knotgrass, fat hen and speedwells. However, mixtures with metribuzin will be antagonistic in terms of cleaver control.
- Use Vivolt at 0.1% v/v when applied alone or in a tank-mix.
Biostimulant solutions
BlueN™
BlueN provides a supplemental source of nitrogen throughout the season, helping plants reach their marketable yield potential.
Contains: Methylobacterium symbioticum.
Pack size: 3kg
Recommended rate: 333g/ha
Maximum no. of applications: 1 application per crop.
Application timing: when the crops are meeting in the row.
Application method: Foliar with sprayer.
Rainfast: 1 hour
Enhanced plant growth and marketable yield
- BlueN enhances plant growth by acquiring atmospheric nitrogen and increases nutrient efficiency in the plant. This process occurs throughout the growing season, resulting in consistent marketable yield increases.
Provides a sustainable source of nitrogen
- BlueN meets changing market expectations by providing a supplementary and sustainable source of nitrogen, without the risk of leaching or releasing additional greenhouse gases. BlueN ensures the plant has access to nitrogen during critical growth phases all season long.
2026 Spring Technical update and CPD quiz
Corteva's Craig Chisholm, Field Technical Manager for Fungicides, reviews the late blight challenge for the UK and Ireland in 2026 and explains why Zorvec Entecta™ and Option® remain essential components of an effective late blight fungicide programme.
Click here to watch the video, then take the quiz to earn your CPD points.
Stay up to date on the 2026 potato crop
Follow the Crop 2026: Emergence, early weed control & late blight rosette spray planning
Follow the Crop 2026: Emergence, early weed control & late blight rosette spray planning
Contact details
If you would like to contact a member of the team, click here to find your local area manager.
Alternatively, you can call our Technical Hotline on 0800 689 8899, email ukhotline@corteva.com, or complete our enquiry form.
