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In the May edition
- Univoq update ahead of T2 fungicide applications
- Zorvec Endavia - use in the programme
- Utrisha N – brand new nutrient efficiency biostimulant
- Stem based diseases – oilseed rape
- Register now for our £200 OSR Offer
- Crop protection packaging update
- Need BASIS points? We've summarised all the ways you can obtain CPD points via Corteva
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Univoq update ahead of T2 fungicide applications - high levels of septoria found in wheat plant samples
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T2 fungicide applications will soon be made. PCR testing has most frequently shown Septoria infections being found in both susceptible and more resistant varieties and laboratory samples analysed by SwiftDetect so far show high levels of Septoria in several varieties such as Skyfall, Skyscraper and even medium levels in Extase. Warm weather, heavy dews and rain showers in the past week have created “almost perfect conditions” for the spread of disease up the plant. Yellow rust has also been found in some areas and both diseases are well controlled by Univoq™ fungicide.
With an unseasonably dry spell during the spring, T1 fungicides were perhaps being applied under a false sense of security. Now we are seeing reports of high levels of latent septoria infection which will become problematic as the season unfolds, much like it did last year.
Univoq has the flexibility growers require to adjust their programmes according to their disease risk. We are advising 1.25 litres per hectare in most situations, but that rate can be adjusted up to 1.5l/ha in high pressure situations, or down to 1.1l/ha. Growers will get long-lasting, robust protection from the Inatreq™ molecule which will also treat any latent infection in the crop. Applied at the T2 timing, Univoq will maintain green leaf area allowing the crop to build yield long after application.
Significant quantities of Univoq continue to arrive in the UK ensuring good supply. Visit the Univoq product page for full technical details and label (here).
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Featured video: Sally Egerton, Corteva’s UK and Ireland Technical Manager, analyses a crop of Wolverine in Shropshire on 14 May 20221 ahead of its flag-leaf T2 fungicide application.
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Don't forget to enter our Univoq summer competition, click on the image below to enter...
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Zorvec Endavia - use in the programme
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Based on Zorvec active fungicide (Oxathiapiprolin), Zorvec Endavia® is co-formulated with benthiavalicarb in a single five litre bottle, providing unrivalled protection from late blight for up to 10 days after application.
To get the best out of Zorvec Endavia, use preventatively in a block of two sprays at the rapid canopy phase for a clean start to your blight programme. Zorvec moves steadily into the leaf and stem tissue, then systemically upwards in the xylem, protecting new growth. This ensures exceptional protection from late blight for the whole plant, with the added benefit of curative activity, unrivalled persistence and a 10-day interval, saving on a spray during a particularly busy period in the season. Adopting this approach provides the cleanest possible start for your crop and leaves the option of using a further two Zorvec sprays later in the programme at the stable canopy stage to ensure a blight free crop.
Click on the image or link below for our latest blight video for 2022.
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Utrisha N – brand new nutrient efficiency biostimulant
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Utrisha® N is an alternative nitrogen source that can supply actively growing plants with additional nitrogen to facilitate plant growth.
The natural bacteria, Methylobacterium symbioticum, fixes nitrogen from the air and converts it into a usable form for the plant.
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Stem based diseases – oilseed rape
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With the window for applying flowering fungicides to winter oilseed rape fast closing, it is worth considering whether the recent difficulty of judging when and what to apply could be made easier for next year.
Pioneer Brand PT303 Winter Oilseed Rape sits at the top of the AHDB Recommended List for gross output yield. The top yield and superior agronomic features of PT303, although well described by the AHDB results, do not convey the additional value PT303 has in deterring infection by Sclerotinia.
This is because currently all AHDB trials, both treated and untreated, usually receive two fungicides at flowering time. Due to the disease minimisation treatment protocol adopted in RL trials, the unique ability of PT303 in reducing levels of Sclerotinia infection, as has been demonstrated in Corteva Research Trials, probably does not fully show up in AHDB yield results.
Also, unlike for Light Leaf Spot and Stem Canker, AHDB do not score varieties for Sclerotinia infection levels so there is no disease scoring that would also illustrate a superior tolerance to Sclerotinia.
Corteva have devised a Decision Scenario table, shown below, that can be used to assist in deciding what the risk is of Sclerotinia infection is, and what the most appropriate crop management might be for a crop of PT303. By sowing PT303 in 2022 the problem of deciding upon your flowering fungicide strategy in 2023 could be easier than ever before.
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*The decision scenario was developed based upon data from field trials conducted over a two-year period and is meant to support you in decision making process. Corteva shall neither be held responsible nor liable whatsoever for any losses or damages resulting from, related to, or in connection with any decision made by you based upon the decision scenario, and all such responsibility and liability is hereby expressly disclaimed by Corteva and waived by you. If you have any questions on anything outlined in the document or would like additional information, please contact your local Corteva representative.
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Register now for our £200 OSR Offer
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If you're planning on growing oilseed rape this season, don't miss out on the opportunity to get a £200 One4All gift card, eligible across a number of your favourite restaurants and shops!
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Take part by purchasing PT303 Protector® Sclerotinia and Belkar® herbicide before the 1st November 2022. Register your interest through our online form, then send proof of purchase through to our team who will validate and send your £200 gift card through. Read more here.
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Just one thistle per m2 can reduce sugar beet yields by as much as 11%. Dow Shield® 400 containing clopyralid, is very active against Compositae weeds such as thistles. Ideally use a programmed approach of 0.25L/ha, which knocks out apical dominance stimulating fresh growth from the crown of the thistle, followed by 0.5L/ha about 14 days later, which will finally kill the weed. If only one spray opportunity is planned, then use a single application at 0.5L/ha to the weed at rosette stage.
Similarly, 5 potato volunteers per m2 can result in a yield loss of up to 16.5 tonnes/hectare, and in addition will be a source of potato blight and potato cyst nematode. Therefore, control of volunteer potatoes is important not just for the sugar beet crop but also for surrounding potato crops and the rotation. Dow Shield 400, ideally applied in sequence of 2 x 0.25L/ha with a 7-day interval, is the go-to strategy for controlling volunteer potatoes in sugar beet.
If there is a simple broadleaved weed problem the addition of 0.25L/ha of Dow Shield 400 to the mix, with activity on e.g., mayweeds and groundsel, will broaden the spectrum and activity of the whole mix.
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Crop protection packaging update
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The packaging of our products continually evolves. Right now, the main features of our packaging are described below:
- Lightweight yet robust
- Bottle design difficult to copy – anti-counterfeit
- Easy to open
- Ergonomic and easy to handle
- Compression seal caps without aluminum foil seals
- Large 63 mm neck size
- Easy to pour without glugging
- Upright and upside-down graduations
- Easy to rinse
- Mono material containers – easy to manage for recycling
As part of our sustainability commitments, the team is now working on the introduction of packaging with a 35% Post-Consumer Recycled (PCR) Plastic content in many of our bottles.
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Learn and earn CPD points with Corteva
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With the time to submit your CPD BASIS points fast approaching, we've collated all the ways you can earn CPD points via content from Corteva. From online courses to subscribing to our newsletters, there are many options available. Find out more by clicking here or visiting www.corteva.co.uk/cpd.
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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, CPC2 Capital Park, Fulbourn, Cambridge CB21 5XE. Tel: 01462 457272. ®, ™ Trademarks of Corteva Agriscience and its affiliated companies. Univoq contains fenpicoxamid and prothioconazole. Belkar contains halauxifen-methyl (Arylex™ active) and picloram.Utrisha N contains Methylobacterium symbioticum. Zorvec Endavia contains benthiavalicarb and oxathiapiprolin. Dow Shield 400 contains clopyralid.
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