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In the July edition
- Protect your potato crop from late blight with Zorvec™ active
- The threat of sclerotinia
- The importance of verticillium stem stripe resistance
- Pioneer provides unique seed treatment for UK farmers growing oilseed rape
- How to establish your OSR this season
- Oilseed rape herbicides and water stewardship
- Quick survey for oilseed rape growers – can you spare some time?
- Pioneer PT303/Belkar® £200 cashback offer – register today
- In case you missed it: Cereals Event competition winner!
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Protect your potato crop from late blight with Zorvec™ active
The season so far:
After a difficult planting period, the crop is in the ground and away. Late Blight outbreaks have been observed in many potato growing areas.
Keep up to date:
Check BlightSpy for the latest forecast of the blight pressure in your area.
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Solutions available:
Zorvec Entecta™ is the latest solution available to growers and 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
Zorvec Endavia® provides unmatched consistency and disease control of Late Blight in potatoes.
- Formulation: Oil dispersion containing 70 g/l benthiovalicarb and 30 g/l oxathiapiprolin - Group 40 + 49 fungicides respectively
- Recommended rate: 0.4L/ha
To view the full range of solutions available, click here.
Stewardship
There has to date been no indication of new strains of P.infestans, or resistance beyond that which UK growers and agronomists have been managing in recent seasons. This suggests that the updated advice has been adopted and proven effective in maintaining the status quo to this point.
Amid the continuing blight pressure, which is likely to be maintained through the rest of the season, looking after the Zorvec active chemistry is key. Alternating modes of action and mixing products where necessary to ensure an effective anti-resistance strategy will provide the best defence against developing resistance within the UK P.infestans population and maintaining the effectiveness of the fungicides available.
View the full Zorvec stewardship guidelines here.
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Upcoming Potato events
You can find the team out and about in August at the following events:
- Potatoes in Practice on 8th August in Dundee, Scotland
- Eurofins Potato Blight Event on 21st August in Derby, England
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The threat of sclerotinia
Sclerotinia isn’t a disease that UK growers will see circulating every year, but when it takes hold the effect on oilseed rape yields can be devastating. Losses can be as high as 60%, but better forecasting, well-timed spray programmes and most recently, genetic advances in varieties all help prevent such circumstances becoming common.
What conditions are needed for sclerotinia?
Sclerotinia requires at least 24 hours of continuous high humidity and night-time temperatures above seven degrees for infection to occur. Wet weather during flowering creates the biggest risk to the crop because this encourages fallen petals to stick to the crop’s leaves. These petals act as a nutrient source for the pathogen, which then grows down the leaf stem to the main plant stem where it presents as large white lesions some two weeks after the plant has become infected.
Reduce the severity of sclerotinia with PT303 and PT312
Pioneer® PT303 Protector® Sclerotinia can provide extra support for your crop when this unpredictable and highly damaging disease strikes. Sclerotinia infection is largely eliminated from both treated and untreated AHDB trials through comprehensive fungicide applications at flowering. In commercial situations flowering treatment programmes may be more limited, and applications may be inadvertently mis-timed. PT312, the second Pioneer hybrid with tolerance to sclerotinia, provides a very high gross output yield with a very high oil content combined with turnip yellows virus resistance.
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The importance of verticillium stem stripe resistance
Verticillium stripe is caused by the fungal species Verticillium longisporum. Verticillium stripe is a monocyclic disease, meaning it only goes through one cycle of the disease each year. However, if infected plants ripen prematurely, they can have reduced yield. Yield losses up to 50% have been observed in Europe. Disease symptoms include leaf chlorosis, early ripening, stunting, and shredding of the stem tissue.
ADAS trials at a UK location with a recent history of verticillium have indicated PT303 has partial resistance or tolerance to Verticillium Stem Stripe. Combined with its tolerance to Sclerotinia, this gives PT303 a unique potential to reduce the severity of yield robbing stem-based disease at harvest. ADAS results at this location confirmed the ability of PT303 to quickly establish high levels of ground cover and grow rapidly in both the autumn and spring, even in a verticillium infected site.
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Pioneer provides unique seed treatment for UK farmers growing oilseed rape
With the oilseed rape drilling campaign starting this month, Pioneer® has outlined the role seed treatments can play in getting the crop off to the best possible start. This year Pioneer is also able to provide unique seed treatments on its varieties being shipped to UK farms.
The insecticide seed treatment Lumiposa® is extensively used in Europe and is an option available when looking for establishment assistance for crops challenged by a range of insect pests. This treatment can be specified when ordering any of Pioneer’s most popular seed varieties including PT303, PT312 and PT315.
Read the full press release here.
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How to establish your OSR this season
A planned approach to oilseed rape establishment this summer will help growers maximise their chances of seeing the full benefit of the crop.
Attention to detail on variety choice, drill dates and weed control programmes all contribute significantly to growing rape that can withstand the vagaries of the weather. The important role of oilseed rape in the rotation remains undiminished, and with prices currently over £390/tonne* there are good financial reasons to plant it in the coming weeks.
Being flexible on drilling dates in order to target the right level of moisture in the soil has been a tactic adopted by many growers, avoiding dry summer days where seed can struggle to germinate quickly.
Choosing the right variety and seed treatments for the farm is also time well spent. A variety’s yield potential is an important measure but it’s not the only one.
Choosing when to invest in weed control can reduce risk too. A Corteva survey in 2023 indicated many had shifted away from pre-emergence herbicide strategies to post application sprays.
There are a lot of unknowns in farming at the moment and what oilseed rape growers want is to manage risk. Making a good plan (and actioning it!) is essential to giving crops the best possible chance. Read more here.
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*Delivered price as per AHDB data. Correct as of 15th July.
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Oilseed rape herbicides and water stewardship
As we approach the 2024 harvest and thoughts turn to the next cropping cycle, some consideration into the position, aspect and layout of your next OSR field(s) will pay dividends in season by mitigating herbicide run-off into water courses in the event of heavy rainfall.
- Aim to grow your OSR on low-risk fields, i.e., those that don’t slope to a watercourse or select a field further away from a water course.
- Consider appropriate establishment, direction of working travel, soil type and topography.
- Lay out tramlines so that they do not provide a direct route for water to leave the field. Disturb the surface compaction in the tramlines if possible.
- Buffer zones next to watercourses reduce run-off and soil particles that may contain pesticides reaching watercourses. The Voluntary Initiative recommends a 6m buffer along watercourses if possible. Wider buffers are advisable in particularly vulnerable areas.
For further information and advice visit our Propyzamide stewardship page here.
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These visuals are from the VI website. For more information click here.
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Quick survey for oilseed rape growers – can you spare some time?
Our survey aims to collect insights which we will share in early September on our OSR hub. This way, OSR growers and advisors can benefit from the perspectives of others. All submissions will be entered into our prize draw for a chance to win a prize bundle. We have 10 bundles available, each containing: A Belkar® messenger bag, waxed chaps, an agronomy pouch and a pair of rigger gloves. The survey closes on 31 August 2024.
Click here to get started.
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Pioneer PT303/Belkar® £200 cashback offer – register today
We are once again running our OSR Offer to help you maximise the potential of your oilseed rape crop. We will be offering £200 cashback to anyone that purchases Protector Sclerotinia tolerant hybrid, PT303 and Belkar® herbicide for the 2024/25 growing season. Anyone taking part in the offer will be eligible for a one-off payment of £200 if purchase is made before 1st November 2024 and a claim is submitted using the online form by 15th November 2024*.
Click here to find out more and register your interest.
*Terms and conditions apply.
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In case you missed it: Cereals Event competition winner!
In our June Arable Update, we highlighted some exciting moments from the Corteva stand at Cereals Event (you can watch our short video here). As an additional update, we’re thrilled to announce that Ed and Angela at E J Lankfer were the lucky winners of our Cereals Event bumper prize, and here is Corteva Area Manager, Tom Rouse, presenting the prize to Ed.
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Subscribing to Corteva Agriscience Arable Update gives eligibility for 2 CP BASIS points and/or 2 NRoSO points and/or 2 CP points for those who are part of the BASIS Environmental Advisors Register (EAR) annually. Sign up to this e-newsletter to receive the points.
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USE PLANT PROTECTION PRODUCTS SAFELY. Always read the label and product information before use. For further information including warning phrases and symbols refer to label. Corteva Agriscience UK Limited, Unit H4, Building H, Melbourn Science Park, Cambridge Road, Melbourn, Cambridgeshire, SG8 6HB. Tel: 01462 457272. ®, ™ Trademarks of Corteva Agriscience and its affiliated companies. All other brand names are trademarks of other manufacturers for which proprietary rights may exist. All manufacturers tradenames and trademarks are duly acknowledged.© 2024 Corteva. Belkar® contains halauxifen-methyl (Arylex™ active) and picloram. Zorvec Entecta™ contains amisulbrom and oxathiapiprolin. Zorvec Endavia® contains benthiavalicarb and oxathiapiprolin. Scenic Gold® contains fluopicolide and fluoxastrobin. Lumiposa® contains cyantraniliprole.
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