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					                                                                     Technical Bulletin
                                                                           Ref. Grandslam: 31/07/10




                                                            GRANDSLAM
                                                             F1 Hybrid Cabbage


OUTSTANDING QUALITIES
     WIDELY ADAPTED
     VERY HIGH YIELD POTENTIAL
     EXCELLENT COLD TOLERANCE
     EXCELLENT FIELD HOLDING ABILITY

Grandslam is a medium maturing hybrid with maturity
around 90 - 110 days from transplanting. Plants are large
and vigorous with an upright habit. Wrapper leaves cover
the heads very well. Heads are uniform, large and very
firm. Holding ability after maturity is excellent through
the over-wintering season. Head shape is round and
slightly flattened around the base of the plant at full
maturity. Grandslam has developed a leading position
being highly favoured for winter harvest where the
holding ability and excellent cold tolerance permit harvesting over a prolonged period. Grandslam
has intermediate resistance to Fusarium yellows (Foc) and is unlikely to suffer from Tip burn under
conditions normally conducive to the condition. Grandslam is used to produce large heads for
individual head sales to hawkers and is also used for bagging.

SPECIAL VARIETAL REQUIREMENTS
  Harvesting should be completed by September to avoid bolting
  Grandslam is suited to January and February sowings in the Highveld. In the South Western
   Cape excellent yields can be obtained with summer sowings
  December sowings should be restricted to areas where late summer Black rot is unlikely to occur
  Contact area representative for a sowing guide

  CHARACTERISTIC*                                       GRANDSLAM
  TYPE                                                  F1 hybrid fresh market cabbage
                                                        (Brassica oleracea L. convar. capitata (L.) Alef. var. capitata (L.) Alef.
  MATURITY                                              Medium (around 90 – 110 days from transplanting)
  HEAD SIZE                                             Large
  HEAD SHAPE                                            Round
  HEAD WEIGHT                                           3.0 - 5.0 kg (could be bigger depending on spacing)
  HEAD COVER                                            Very good
  EXTERIOR COLOUR                                       Blue-green
  INTERIOR COLOUR                                       Yellow light green
  FLAVOUR                                               Very good, sweet taste
  PLANT SIZE                                            Large
  PLANT HABIT                                           Semi-erect
  BOLTING REACTION                                      Sensitive to bolting if produced through winter for spring harvest
                                                        Intermediate resistance: Fusarium oxysporum f. sp. Conglutinans
  DISEASE REACTION                 (SCIENTIFIC)
                                                        (Foc)
  FIELD HOLDING                                         Excellent
  YIELD POTENTIAL                                       Excellent
  SUGGESTED POPULATION                                  28 000 - 35 000 plants per ha
  USE                                                   Sold as individual heads and per bag
  SPECIAL FEATURES                                      Excellent cold tolerance and yield potential
* Characteristics given are affected by production methods such as soil type, nutrition, planting population, planting date and climatic conditions.
   Please read disclaimer.

Disclaimer: This information is based on our observations and/or information from other sources. As crop performance depends on the interaction between the genetic potential
of the seed, its physiological characteristics, and the environment, including management, we give no warranty express or implied, for the performance of crops relative to the
information given nor do we accept any liability for any loss, direct or consequential, that may arise from whatsoever cause. Please read the Sakata Seed Southern Africa (Pty)
Ltd Conditions of Sale before ordering seed.
Resistance: is the ability of a plant variety to restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible
plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or
pathogen pressure (HR = High resistance, IR = Intermediate resistance).
Recent version: Kindly contact Sakata or Area Representative for the most recent version of this Technical Bulletin.

Sakata Seed Southern Africa (Pty) Ltd.                             Copyright: (not to be reproduced)                                Email. info.saf@sakata-eu.com
Tel. +27 11 548 2800                                                   Fax. +27 11 548 2820                                            Website. www.sakata.com
                                                                     Technical Bulletin
                                                                           Ref. Grandslam: 31/07/10



                                 GENERAL TIPS FOR CABBAGE PRODUCTION
Seedling production                                                                            through the life of the crop is more beneficial, cost
Seedlings (not older than 4 to 6 weeks for summer                                              effective and results in good quality produce.
and 6 to 8 weeks for winter) should be grown in a
medium which is well aerated, has a good water                                                 Cracking of cabbage
holding capacity and should have a pH of about                                                 Symptoms
6.5. Peat, bark and vermiculite mixes are generally                                            - The cabbage head cracks open
used. Typical media problems include excessive                                                 - Often seen as bursting or spitting of the head
tannins, low air filled porosity resulting in poor                                             surface
drainage and green mould build up.         Medium
should be pre-enriched and seedlings should be                                                 Causes
fertilized.   Germination occurs best when the                                                 - Natural effect that occurs in cabbage once the
seedling trays are in a germination chamber                                                      cabbage has hardened but continues to expand
running at 20 °C and with a high humidity. At the                                              - Hot temperatures, excess water, high humidity
first sign of germination, the seedlings should be                                               and warm soils all favour bursting.
moved out onto the racks of the tunnel. Seedlings                                              - Early varieties are more inclined to burst than
should ideally be grown at a temperature of                                                      late varieties
20 °C.                                                                                         - Some varieties are more susceptible to bursting
                                                                                                 than others
Plant spacing
Spacing and plant populations are extremely                                                    Control
important as they affect the final product,                                                    - Plant varieties those are resistant to bursting,
especially size in cabbage. Wider spacing may be                                                 especially during summer production
necessary under specific environmental conditions                                              - Hercules, Grandslam, Conquistador and Tenacity
and will aid in producing a quality final product.                                               all have good resistance to bursting
Wider spacing is required as the climate becomes
hotter and more humid to prevent increased                                                     Disease resistance definition
chance of disease. This is also the case where                                                 Resistance: is the ability of a plant variety to
there is a possibility of drought and should be                                                restrict the growth and development of a specified
practised on heavy soils.                                                                      pest or pathogen and/or the damage they cause
                                                                                               when compared to susceptible plant varieties
Table showing suggested plant populations of                                                   under similar environmental conditions and pest or
cabbage:                                                                                       pathogen pressure. Resistant varieties may exhibit
                                                                                               some disease symptoms or damage under heavy
                                                 Plant population                              pest or pathogen pressure. Two levels of resistance
  Type                Size                       (plants/ha)                                   are defined:

                      Large                      28 000 – 35 000                               High/standard resistance (HR): plant varieties
  Cabbage             Medium                     55 000 – 65 000                               that highly restrict the growth and development of
                      Small (Baby)               80 000 – 100 000                              the specified pest or pathogen under normal pest
                                                                                               or pathogen pressure when compared with
                                                                                               susceptible varieties. These plant varieties may,
Fertilisation                                                                                  however, exhibit some symptoms or damage under
Brassica crops have a high nutritional requirement                                             heavy pest or pathogen pressure.
with the main factors limiting yield in many areas
of South Africa being soil acidity, low soil                                                   Moderate/intermediate resistance (IR): plant
phosphorous, low soil nitrogen and potassium                                                   varieties that restrict the growth and development
levels as well as low or unavailable molybdenum.                                               of the specified pest or pathogen, but may exhibit
A good nutritional programme is essential to                                                   a greater range of symptoms or damage compared
maintain high nutrient levels in the soil with annual                                          to resistant varieties. Moderately/intermediately
applications based on a reliable soil test. Soil tests                                         resistant plant varieties will still show less severe
should be conducted for each field prior to planting                                           symptoms or damage than susceptible plant
to record the status of the soil and to be able to                                             varieties when grown under similar environmental
correct any nutrient imbalances and problems prior                                             conditions and/or pest or pathogen pressure.
to planting. Applying small amounts of fertiliser




Disclaimer: This information is based on our observations and/or information from other sources. As crop performance depends on the interaction between the genetic potential
of the seed, its physiological characteristics, and the environment, including management, we give no warranty express or implied, for the performance of crops relative to the
information given nor do we accept any liability for any loss, direct or consequential, that may arise from whatsoever cause. Please read the Sakata Seed Southern Africa (Pty)
Ltd Conditions of Sale before ordering seed.
Resistance: is the ability of a plant variety to restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible
plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or
pathogen pressure (HR = High resistance, IR = Intermediate resistance).
Recent version: Kindly contact Sakata or Area Representative for the most recent version of this Technical Bulletin.

Sakata Seed Southern Africa (Pty) Ltd.                             Copyright: (not to be reproduced)                                Email. info.saf@sakata-eu.com
Tel. +27 11 548 2800                                                   Fax. +27 11 548 2820                                            Website. www.sakata.com

				
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