Every month, our Customer Technical Advisor, Caroline Linsdell, compiles a list of frequently asked questions based on the phone calls and emails she receives from growers and agronomists.
Read the latest questions below or browse the archive.
I have been told that there is a Hybrid barley germination seed test offer. What is it?
Recognising the difficult planting conditions last autumn, Syngenta is offering UK growers free germination testing of undrilled 2019 seed of its hybrid winter barley varieties that are having to be carried over for planting in autumn 2020. Open to UK growers only, and applying to Syngenta hybrid barley seed originally purchased for planting in autumn 2019, up to two free germination tests per grower are available (see https://www.syngenta.co.uk/varieties/hybrid-barley/syngenta-hybrid-barley-germination-testing for further details).
I was unable to drill my hybrid barley in the autumn as the fields were too wet. Can I drill it now?
No. Most hybrid barley seeds are treated with either CELEST TRIO or RAXIL STAR. The label for these products states that “Treated seeds must not be sown between 1 February and 31 August.” Growers should store the seed correctly and register for the Syngenta germination offer (see Q1 above).
When should I commence my nitrogen programme for my hybrid barley?
In many cases there will be fewer tillers, therefore a nitrogen programme with a split of 30:50:20 with the first application to be applied as soon as possible (GS25), when soil and weather conditions allow. A 50:50:0 is an alternative if a 3 split programme is incompatible with on-farm workloads/conditions. Refer to RB209.
There is conflicting advice about how late a winter wheat can be drilled. Had comments that some can be drilled into the beginning of March, what are Syngenta’s thoughts?
Winter wheat requires a vernalisation period which means there are latest safe sowing dates and this is variety specific. GLEAM, for example, has a shorter vernalisation period than many other commercial varieties which means it has a latest safe sowing date of mid-February. Be aware that late drilled crops are likely to have lower yield potential.
Do I need to adjust my spring agronomy for late-drilled winter wheat crops?
Yes. Growers and agronomists will need to focus on the agronomy of late-drilled crops to maximise yield and quality. Crops drilled very late into wet soils and at high seed rates are likely to be poorly rooted and competition within the crop may result in taller plants. PGRs should be used to manage risk accordingly. Experience has shown that late drilled crops which have not tillered well are likely to respond positively to early nitrogen to increase yield potential.
I’ve drilled my GLEAM in February, is it still classed as a winter wheat?
Winter wheat can be drilled anytime but for using with a pesticide if it is after 1st February it is classified as a spring crop as it has not gone through vernalisation. So, winter wheat drilled after 1st February is defined as spring wheat and therefore spring wheat should be on the product label to use it on this crop. This is according to CRD.
Can cereal seed still be treated with AUSTRAL PLUS?
Yes, as long as the crop is drilled before 31 August 2020.
What is the earliest that AXIAL Pro can be applied to winter cereals and is an adjuvant needed when used to control wild oats?
AXIAL Pro can be applied to winter cereals from 1 February. Trials have shown that an adjuvant is only required if the dose rate is reduced to 0.4 l/ha and the wild oats are no larger than GS29. If the wild oats are beyond GS29, then the dose rate should not be reduced below 0.6 l/ha.
I note that REVUS has approval for use on vining peas. Why is there no approval on combining peas?
Yes, 0.6 l/ha x 2, with a 14 day PHI, for downy mildew control. There was no data produced for combining peas. Therefore, Syngenta are unable to make a label claim.
Can WAKIL XL still be used on broad beans under the EAMU?
No, unfortunately the EAMU is no more.