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In the November edition
- Crop size for Belkar application
- Killing off companion crops in oilseed rape
- Applications of Astrokerb and Kerb Flo 500 in oilseed rape
- Volunteer bean control in Cereals with Spitfire
- Best practice guidelines for Inatreq product use in 2023
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Crop size for Belkar application
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Oilseed rape drilling strategies are beginning to pay off for growers this year. Plants are establishing well and are beginning to look good before the onset of the winter’s frosts. Ideally, and following good practice, wait until colder conditions open the canopy exposing the weeds below before applying Belkar®. It will work in conditions as low as 2°C however, in trials throughout the UK and on the continent, large crop canopies have never been reported to have caused reduced performance from a Belkar application.
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Killing off companion crops
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Drilling oilseed rape with a companion crop or companion crop mixture is becoming more common place and confers a number of benefits including mitigating the risk of cabbage stem flea beetle damage, delivering nitrogen and phosphate, and encouraging crop rooting during establishment. Many companion crops comprise legumes such as berseem clover and vetches, or even polygonums like buckwheat.
As we progress into winter, frosts will kill off some species such as buckwheat and phacelia but some of the legumes can be a little more persistent and will need a herbicide to remove them from the now established oilseed rape crop. Both Belkar and Astrokerb® have activity on legumes and thus can effectively remove clover, vetch, or legume-based companion crops from the oilseed crop.
Astrokerb at 1.7L/ ha will control grassweeds like blackgrass, broad-leaved weeds such as mayweeds and thistles, as well as the companion crops mentioned above. If there are cleavers or cranesbill and grassweeds present, then a tank mix of Kerb® Flo 500 at 1.7L/ha with Belkar at 0.5L/ha will control these and provide effective control of clover or legume-based companion crops. Both these solutions will give good control of poppies if present.
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Applications of Astrokerb and Kerb Flo 500 in oilseed rape
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Applications of Astrokerb and Kerb Flo 500 should not be made until the soil temperatures have got down to 10°C and falling at 30cms depth, and there is sufficient moisture in the soil for plant uptake.
Corteva’s Kerb Weather Data decision support tool provides information to help guide decision making for Astrokerb® and Kerb® Flo applications. For full access, download the free Corteva arable app version at www.corteva.co.uk/kwd.
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VIDEO: Astrokerb and Kerb Flo 500 - propyzamide best use advice
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Volunteer bean control in cereals with Spitfire
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Pod shatter is always a problem when harvesting winter and spring beans, even when conditions are good. The plentiful moisture means that the levels of volunteer bean germination will be high in winter cereal crops this autumn. Volunteer beans can be competitive weeds, especially at the high densities we are likely to see this season.
Spitfire® offers cost effective control of volunteer beans. Use 0.5 L/ha plus an adjuvant to control volunteer beans up to four true leaves (two pairs). Use of Spitfire at this rate allows a follow-up with up to 1L /ha of Zypar® in the spring.
Supported adjuvants include MSO-type or Abacus, Arma, Bio Syl, Intracrop Cogent, Kantor, Respond, Roller, Spryte Aqua or Intracrop Tonto. For larger volunteers (up to six true leaves/three pairs), increase the use rate to 0.75 L/ha of Spitfire plus an adjuvant. This will allow use of Zypar up to 0.75 L/ha in the spring. Spitfire can be added to residual herbicides such as pendimethalin and flufenacet. Spitfire approvals include winter wheat, barley oats, rye and triticale.
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Best practice guidelines for Inatreq™ product use in 2023
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Products containing Corteva Agriscience’s cereal fungicide Inatreq™ active have, over the past two growing seasons, proven their ability to deliver outstanding control of key diseases - most notably septoria and rusts.
This novel chemistry even has the ability to control septoria isolates which have become resistant to other chemistry on the market, allowing crops to stay greener for longer, building that all-important yield for UK and Irish growers.
Trials have shown that applying Univoq™ at T2 on your wheat in 2021 would have yielded an average 0.25t/ha* benefit worth £50/ha (read more here).
For farmers and sprayer operators who want to utilise the unique benefits of products containing Inatreq active in 2023, Corteva will be issuing best practice application advice and resources to help optimise field operations. Through videos and other information, users of Inatreq active will be equipped with practical advice on daily sprayer hygiene, best practice, regular and annual maintenance, including the additional guidelines from Corteva. This information will be made available very soon at www.corteva.co.uk/inatreqadvice.
If you would like us to send you an email when this video has been uploaded, please let us know by completing our short enquiry form at www.corteva.co.uk/enquiry.
(*mean yield advantage of 1.25L/ha Univoq over 1.0L/ha Revystar® XE across 36 Corteva UK WW T2 trials 2021. Value based on £200/T.)
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Staying in touch and monthly prize draw
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Have you signed up to one of our e-newsletters? Don't forget to check the box to enter our monthly prize draw.
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If you have feedback on this email, or would like to see new topics included in the future, please send us an enquiry or get in touch using the details below.
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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. All other brand names are trademarks of other manufacturers for which proprietary rights may exist. All manufacturers tradenames and trademarks are duly acknowledged. © 2021 Corteva. Astrokerb® contains aminopyralid and propyzamide. Belkar® contains halauxifen-methyl (Arylex™ active) and picloram. Inatreq® active contains fenpicoxamid. Spitfire® contains fluroxypyr and florasulam. Zypar® contains Arylex active and florasulam. Kerb®Flo 500 contains propyzamide Korvetto® contains clopyralid and halauxifen-methyl (Arylex™ active).
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