Sifra

SIFRA

  • Very attractive bright skin
  • High yield
  • Broad adaptation
  • Low nitrogen requirement
  • Early tuberisation

      Tuber Characteristics
      Cooking type: AB - Slightly firm
      Maturity:
      Late
      Yield mature:
      Very high
      Yield early:
      Very high
      Tuber size: Large
      Tuber shape:
      Round oval
      Number of tubers:
      9-11
      Flesh after cooking: Cream
      Skin colour: Light yellow
      Dormancy period: Medium
      Emergence: Normal
      Metribuzin sensitivity: Little sensitive
      Foliage development: Strong
      Internal bruising: Quite sensitive
      Little Potato disorder: Not sensitive
      Dry matter content/Starch: 19,6% / 13,8%
      UWW / Specific gravity: 358 / 1,076
      Spraing Susceptible
      Foliage Blight Slightly susceptible
      Tuber Blight Moderate resistant
      Alternaria:
      Slightly sensitive
      Common scab Slightly susceptible
      Powdery scab Susceptible
      PVY Very susceptible
      Yntn tuber tolerance Slightly sensitive

      PCN Resistance
      Type
       Value
      Ro1
      9
      Ro2/3
      4
      Pa2
      6
      Pa3
      1

       
       Wart Disease
      Fysio
       Value
      F1 9
      F2 3
      F6 3
      F18
      2

      General production advice ware potatoes

      Pre-treatment and planting
      • SIFRA can be grown on all soil types.
      • On heavy soils a good structure is needed to avoid misshapen tubers.
      • Avoid soils with too high risk of powdery scab.
      • Can be planted with small white buds but good pre-sprouting can advance the crop.
      • Follow the advised plant populations, as SIFRA gives high tuber numbers per plant.
              Growing attention points
              • Use products that have an effect on Alternaria solani and Alternaria alternata.
              • Use a robust Phytophthora programme, to prevent foliage blight.
                  Haulm killing and harvest
                  • An unset skin will have a negative effect on storability.
                  • Ensure the crop is naturally mature before haulm killing. Make sure the tubers are fully skin set before harvesting.
                  • High dry matter and cold conditions during harvest will increase the risk of bruising.
                  • Prevent mechanical damage to improve storability.
                    Storage
                    • SIFRA is suitable for long term storage.
                    • Good curing is essential as SIFRA is quite sensitive to Fusarium.
                    • SIFRA is slightly susceptible to Phoma, pay attention to skin curing. A fast drop of temperature will increase the risk of Phoma.
                    • Stable temperature during storage prevents silver scab development.