Alexia

(Cross: BH 93-30 x Bildtstar)

Maturity

Medium early

Tubers

Oval-long, very shallow eyes, white skin, yellow flesh, fine beautiful grade, lot of tubers, good yield, dormancy and dry matter content.

Foliage

Rapid developing, middle high, well covered, violet flowers, few berries.

Resistance

Potato cyst nematodes Ro 1-4, wart disease race 1.18. Blight susceptible in foliage and a less susceptible in tuber. Strong against common scab and tuber misshape something susceptible for virus and fusarium.

Market Outlet

Table (salad type), cooking type AB firm.

Cultivation

Normal to above normal N fertilisation, above normal potash fertilisation with microspore. Sensitive for soil herbicides. Normal plant density. Something sensitive for bruising and harvest damage. Very good storable.

Preparation of seedpotatoes

Seed potatoes should preferably be stored at 3-4 °C (mechanically cooled storage facility) until 2-3 weeks before planting. Approximately 2 weeks before planting tubers should be pre-germinated by means of applying a temporary warm environment (eyes should just be opened). Strong pre-sprouting and de-sprouting should be avoided in order to avoid irregularity during emergence. Only top-sprouts can be removed. Alexia is very dormant.

Planting

In order to obtain regular emergence, a good soil structure and acceptable soil temperature is required during planting. Planting depth recommended same as for Bintje. Optimum planting rates depend on tuber size, and purpose size of ware potato. For ware potato production size 40-65 following rates are recommended:

size 28/35 mm:                planting distance ca. 20 cm (ca. 2.000 kg/ha),

size 35/50 mm:                planting distance ca. 30 cm (ca. 3.000 kg/ha),

size 35/55 mm:                planting distance ca. 30 cm (ca. 3.300 kg/ha).

Alexia has a good resistance against scab and is suitable for the sand and sandy-clay soil type.

Plant protection & fertilisation

Alexia is sensitive fore chemical treatment with herbicides such as Sencor or Boxer. Special when Alexia has emerged plants can suffer from it.

For nitrogen fertilisation a gift is recommended of +20 kg compared to Bintje. Best applied 2/3 before planting and 1/3 during tuberisation. Phosphate: regular amount. As for potassium fertilisation it is recommended to start with a sufficient potassium level in the soil. In case the potassium level is lower a recovery fertilisation is recommended in autumn. Furthermore a potassium gift of 150 kg (heavy soils) - 180 kg (light soils) is recommended in spring (potassium-chloride).

As for Phytophthora special attention should be paid to leaf infection (Alexia is slightly more susceptible to leaf and tuber infection compared to Bintje).

Harvest & storage

Alexia should be harvested gently (with good matured skin) in order to prevent skin damage.

Allow minimum 2 weeks between leaf destruction and harvesting. Harvest should take place with minimum soil temperature of 15 °C.

The temperature during storage should from a wound-heeling period at some 14°C be brought down to minimum 7°C. Alexia is good storable and will not germinate easy. When anti sprout is used be aware of skin burn.

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