Brewing potential and extremely high treated and untreated yields
Yield potential
CROPTON was the highest yielding variety of all lines completing NL2 in 2007.
Source: HGCA RL Candidates, harvest 2008. hgca.com/varieties
Disease resistance
CROPTON has a very good resistance to mildew and has shown very high untreated yields confirming its excellent overall disease resistance.
Source: HGCA RL Candidates, harvest 2008. hgca.com/varieties
Fungicide use
CROPTON has a very good disease resistance profile, combining very good green leaf retention with good resistance to Ramularia. As such CROPTON could be considered a low input variety but would still benefit from a standard two spray program.
NB: Syngenta Seeds believe that at this stage of varietal development disease resistance ratings are not necessarily conclusive due to insufficient data being available.
- T0 - Needed only in extreme disease pressure situations.
- T1 - T1 is key for protecting the canopy during the plants main burst of growth.
- T2 - T2 application helps to protect the plant during grain fill and can ensure a healthy harvest. Strobilurins protect against foliar diseases and Chlorothalonil has demonstrated excellent control of biotic and abiotic spotting.
NFC advises;
- T0 (>GS25): Not normally required
- T1 (GS25/32): Kayak 0.5 lt/ha + Bravo 1.0 lt/ha. (If brown rust control is required or infection is anticipated then add Epoxiconazole at 0.25 – 0.5lt/ha)
- T2 (GS39/51): Amistar Opti 1.25 lt/ha. (If Rhynchosporium risk is high then consider adding ½ rate triazole).
Agronomic information
Source: HGCA RL Candidates, harvest 2008. hgca.com/varieties. *Data from Syngenta Seeds trials
CROPTON has medium straw length with good resistance to lodging and brackling.
CROPTON is a medium / early maturing variety and produces a big, bold grain sample. CROPTON could suit growers seeking a replacement for similar maturing varieties, for example Cellar.
Growth habit
- Early Spring: Semi-prostrate
- Tillering ability: Medium
- Maturity: Medium / early
Drilling information & dates
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.
The chart above should always be used in conjunction with thousand-grain weight of the seed to calculate the correct seed rate.
- Suitability for early drilling: Good
- Suitability for late drilling (April): Good
- Optimum drilling date: Scotland (March – early April), England (Mid-February – mid-March)
Nitrogen application
Grain nitrogen levels in CROPTON are typically 0.05% below Optic (Optic at 1.55% would put CROPTON at 1.50%).
Whilst difficult to advise on exact fertiliser rates, most growers know how much nitrogen to apply for Optic. For CROPTON use a similar level and timing of nitrogen fertiliser.
PGRs
CROPTON is a stiff strawed variety so PGRs would not normally be required. However NFC advises the use of Moddus on lush crops or very fertile sites. Apply 0.1l/ha at GS 29-30 to stabilise tillers and promote root development
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If you require any more information about this variety, please contact Syngenta Seeds on 01223 883400
Disclaimer
The information given in these pages is for general guidance only. Whilst every care has been taken to ensure it is accurate, it is out of necessity, of a general nature and variation in growing environment or climate and/or changes to legislation, regulations and best practice can render it inaccurate. Syngenta Seeds Limited cannot accept any liability arising out of or in conjunction with the use of this information. Crop protection products should be used in conjunction with manufacturers’ recommendations. Use pesticides safely – always read the label. Consult your agronomist for the most current advice.
