Doyen

Robust and very high yielding spring feed barley

Parentage: Linden x Colada

Status: HGCA Recommended List 2007 and SAC Recommended List 2007

Yield Potential

Doyen is one of the highest yielding and most consistent varieties available in treated and
untreated situations. Doyen is a top choice feed variety where Rhynchosporium is a concern.

Yield table

Doyen has produced consistently high yields across all regions of the UK , ensuring it is a reliable variety to grow, both for grain and straw production.

Yield table

Disease Resistance

Doyen has exceptional disease resistance with a high Rhynchosporium and mildew rating.
However a managed fungicide programme is recommended.

Disease resistance

Fungicide Use

Getting early to mid season agronomy right is crucial to establishing a healthy crop.

T0 -

The T0 spray prevents diseases gaining a foothold in long growing seasons or where disease
pressure is high. The use of Unix helps keep Rhynchosporium at bay.

T1-

Timing is key for protecting the canopy during the plants' main burst of growth.
Kayak + Triazole provides broad spectrum disease control.

T2-

Managing late season plant health is also vitally important to ensure a healthy harvest.
This is the key time to protect grain fill with awns and green leaf areas being the key targets.
Strobilurins protect against foliar diseases and Chlorothalonil has demonstrated control of biotic
and abiotic spotting.

CORE PROGRAMME

T0 -	Unix and Tern (should be used where disease pressure is high)
T1-	Kayak + Triazole
T2-	Amistar Opti + Triazole

Agronomic Information

Doyen is earlier maturing than Optic – 1-3 days earlier in England and up to 5 days in Scotland , therefore harvest management should take account of this.

Agronomic Information

Growth Habit

Early Spring - Semi prostrate

Tillering ability - Medium

Maturity - Early - Medium

Drilling Dates

Suitability for early drilling - December onwards

Optimum drilling date - England - January - February, Scotland - February - March

Suitability for late drilling (April) - Acceptable

Recommended Sowing Rates

Seed rates are dependent on soil conditions at the time of drilling, the more difficult the environment, the higher the seed rate must be to compensate for potential plant loss. The table below shows the suggested number of seeds per square metre that should be planted under good conditions.

Sowing rates

The chart above should always be used in conjunction with the thousand-grain weight of the seed to
calculate the sowing rate.

Nitrogen Application

When growing high yielding feed spring barley crops, it is important to have a high nutrient supply. As a base guideline apply 10–15% extra than an Optic crop grown for malting. Seed bed applications are not so important for feed varieties and therefore Nitrogen should be a split dose with 50% at GS 11/12 and 50% at GS 21/22.

PGR's

Normally not required, however NFC advises their use on lush crops or very fertile sites. In these cases use low rate Moddus (0.1 – 0.2 l/ha) at GS 29-30 to stabilise tillers and promote root development.

Quality

Doyen is a high yielding feed barley with excellent grain size, which has also performed well in wholecrop situations.

Grain Quality

Specific Wt - 69.2 kg/hl
Sieving % through - 2.25mm - 2.5%
Sieving % through - 2.5mm - 7.6%

Harvesting

Normal harvest priority - Doyen has excellent resistance to ear loss, but it is always advisable to harvest the crop in the best condition as soon as moisture is correct.

All information is a partial extraction from the New farm crops website and also the HGCA Recommended List 2007/8. See http://www.newfarmcrops.co.uk/ and also www.hgca.com for the full dataset