improve establishment, and brassi- ca-containing cover crops sown later in nearby fi elds 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 fl ea 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.
Early drilling can combat fl ea beetle – but brings other risks
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 suffi cient 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 traffi cking 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 aſt er 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 fl exibility 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
HARVEST INSTALLATIONS CROP
DRYING SPECIALISTS 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. Levels of fl ea beetle larvae can be
reduced by sheep grazing or mechani- cal defoliation but this must be neither too intense nor too close to stem ex- tension 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.
HARVEST INSTALLATIONS
HARVEST CONSTANT HUMIDITY
JUWEL 10 – THE POWERFUL MOUNTED REVERSIBLE PLOUGH FOR THE TOUGHEST CONDITIONS
CONTROLLER Gives you guaranteed drying conditions, 24/7. Efficient and economic with thousands of units in use on all combinable crops and onion stores nationwide.
Optimal lower and upper link position with large tractor tyres
Use in even extremely diffi cult soils Use with tractors with up to 4 metres external width
For on-land operation always suffi cient distance to the furrow edge and therefore no furrow breakage
CALL: 01795 533903 Main Office: Unit 2/3 Oaklands Park, Rougham Hill, Bury St Edmunds, Suffolk, IP33 2RW.
info@harvestinstallations.co.uk
www.harvestinstallations.co.uk
Optional upper link damping system protects tractor and plough components
lemken.com JULY 2021 •ANGLIA FARMER 39
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