International Grain, Seed and Fertiliser Merchant

2014 Agronomy Bulletin

Cha Cha – generally good disease resistance with the exception of Brown rust, and good lodging / brackling characteristics, but will respond to fungicides and PGRS in high fertility situations.

Charmay – similar in many ways but weaker on Rhynchosporium, so will benefit from good rhycho treatments in the high risk areas.

Chapeau – one of two new high yielding null-lox varieties, with medium straw length and good resistance to mildew and net blotch but will respond to fungicides for Rhynchosporium and rusts.

Cheerio – the other new higher yielding variety, with medium length stiff straw, and good resistance to mildew and net blotch, but will respond to fungicides for rust control.

 

Drilling advice

Sowing Time: Ideally February – March, as soil conditions allow.

Seed Rate: Sow at seed rate to finish with the following plants established see below.

MONTHLIGHT SOILSMEDIUM SOILS
FEBRUARY300 – 320320 – 350
MARCH APRIL320 – 350350 – 375

 

In this bulletin we will look at 2 growing situations:-

1) Drier Eastern Counties soils

Crop Nutrition: NPK of these, Nitrogen and Potash are the most important.

Nitrogen – dependant on soil N(N-Min test) and RB209 / N-Max restrictions, apply 80 – 125 KG / ha.

For early drilled crops ideally a split dose of 30% / 70% in the Seedbed / During Tillering (or 50 / 50 can be used). For later drilled crops (March /April) apply all N post drilling / pre emergence.

Phosphate & Potash – Apply post emergence according to soil status and RB209. Sulphur is also very important – apply 50 Kg / Ha SO3 as a minimum. Apply as sulphate fertiliser – e.g. Double Top or similar.

Weeds, Pests and Diseases etc.

In Wheat Bulb Fly situations use Austral Plus dressed seed and avoid deep drilling or apply an insecticide at egg hatch (chlorpyrifos), or delay sowing to avoid pest invasion. If using chlorpyrifos please remember the “Say No To Drift” campaign, for further info speak to your agronomist.

Grassweed control can be important for early drilled crops:- triallate 15 Kg/Ha and prosulfocarb (EAMU) @ 2.0 l/ha used pre-em or flufenacet + diflufenican, 0.3 L/Ha and flufenacet + pendimethalin 2.0 L/Ha can form a useful basis for blackgrass control followed with pinoxaden post emergence, which also has activity on wild oats and ryegrass. For annual meadow grass control there is a range of actives including pendimethalin +/- picolinafen, and diflufenican (EAMU) for use in this crop.

With Spring Barley it is possible to attack several Crop Protection issues at one go.

At Early Tillering GS 21 – GS 25 Weed Control, Fungicide +/- Manganese application can be tackled. There is a wide range of broad leaved herbicides and fungicides that can be used in spring barley, and these should be tailored to the local weed problems and disease issues accordingly.

PGR – not usually required for Cha Cha which has good straw strength but other varieties will benefit. However in the event of early drilling and a season of excessive soft growth, trinexapac-ethyl can be beneficial to all the varieties.

Second Fungicide – Usually timed for best effect with early awn emergence.

Manganese – apply at all stages of crop protection applications. Check compatibilities of manganese formulations with whatever chemistry you are intending to use.

Trace Elements:

Manganese – apply at all stages of crop protection applications. Check compatibilities of manganese formulations with whatever chemistry you are intending to use.

Magnesium (Mg) very important at ear emergence to cover plant demand at this stage. Apply Magnesium Super 80 at 2nd fungicide application.

Zinc applications should be considered in all cereals and this can be applied in a formulated mix or as straights whenever Mn is applied

Foliar tissue test should be considered at the onset of stem extension to identify specific needs.

 

2) Moisture retentive Soils/Chalks in the South & SW England

Crop Nutrition: The aim here is to achieve 7.5 – 8.5 t/ha.

Nitrogen – dependant on soil N (N-Min test) and RB209 / N-Max restrictions, apply up to 125 KG / ha.

This should be split between 30-40Kg in the seedbed, with an equivalent amount of sulphur. The remaining N should be applied when the rows are visible and before the crop meets in the row.

Phosphate & Potash – Apply post emergence according to soil status and RB209.

Weeds, Pests and Diseases etc.

Weed and disease control as per above are dependent on local needs, but generally based around two applications of fungicide:-

T1- @ GS22-23 fungicide + PGR (trinexapac -ethyl)

T2 – @ awns emerging GS 49 fungicide + PGR (ethephon +/- mepiquat chloride)

Although Cha Cha has good standing abilities in these situations where it is being pushed, the use of PGR ensures the grain is harvested and not lost due to necking of heavy heads.

Micro nutrients correct any Copper and Magnesium issues, plus other nutrients as required.

 

Colin Button Seeds Manager H L Hutchinson Ltd. January 2014

Dick Neale Technical Manager H L Hutchinson Ltd. January 2014

 
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