improve establishment, and brassica- containing cover crops sown later in nearby fields may be useful in ‘trap- ping’ migrating CSFB.
Varieties
As well as establishing vigorously, va- rieties should be rapid in their devel- opment to get crops away but not so fast that they produce excessively-for- ward pre-winter canopies. Varieties that are earlier or faster in their spring regrowth can provide valuable extra tolerance to higher lev- els of flea beetle larvae. First-class standing power based on the best combination of stem stiff- ness and lodging resistance is more essential than ever.
Strong light leaf spot resistance is also crucial, combined with good re- sistance to verticillium where possible. Turnip yellows virus resistance can be a useful extra safeguard, although only in addition to the more impor- tant priorities.
Management
Seed rates leading to higher-than-ide- al plant populations should be avoided to ensure the most productive canopies
Machinery
Single pass establishment is essential, with speed balanced by sufficient care and precision in seed placement in particular. Where the soil is in good enough
condition with an unrestricted structure for root penetration and drainage, no-till drilling should be preferred. Alternatively, structural concerns
and any harvest trafficking damage can be tackled with some low disturbance metal at depth as part of a tailored seeding regime. Seed should always be sown through
coulters into soil re-consolidated aſter any disturbance to provide good depth control and seed-to-soil contact.
and stems with the least susceptibil- ity to CSFB larval damage. The reduced threat from phoma should give more flexibility to delay autumn fungicide treatment, target- ing it more effectively against the high- er light leaf spot risk.
An early autumn application of metconazole may be needed to regu- late the growth of crops that are par- ticularly forward – especially if they
are also very thick.
Relatively large canopies coming out of the winter put the onus on care- ful spring N management to Green Area Index (GAI) and effective plant growth regulation.
Flea beetle larvae can be reduced
by sheep grazing or mechanical defo- liation but this must be neither too in- tense nor too close to stem extension to avoid compromising yields.
Machines should be able to cope with
long stubbles and trash; apply fertiliser with the seed; and, ideally, also be able to sow companion crops and apply slug pellets.
Mobile irrigation management system
• Monitoring of Rainstar operation • Optimize your irrigation management • Automatic Error messages
• Irrigation control via mobile devices • Team management • Automatic reports
Röhren- und Pumpenwerk BAUER Ges.m.b.H. 8570 Voitsberg, Austria, Phone +43 3142 200-0,
sales@bauer-at.com,
www.bauer-at.com
Contact Adrian Tindall: T 07708 919597 E
a.tindall@bauer-at.com JULY 2021 • MIDLAND FARMER 21
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