Constance is a mid-early main crop tableware variety, known for its high quality and popularity.

It is a high-yielding variety with excellent storage qualities, making it highly suitable for washing and pre-packing.
Constance can be grown in most soil types and shows strong resistance to viruses.
It is well-suited for baking.
This versatile variety has yellow skin and pale yellow flesh, and is characterized by early development after planting, oval-round uniform tubers, and shallow eyes.
It is a mid-early variety with excellent heat tolerance.

Tuber Characteristics

Skin Color: Yellow
Flesh Color: Light yellow
Tuber Shape: Short oval
Tuber Size: Medium
Eye Depth: Shallow
Dry Matter Content: 19.7%
Cooking Type: AB
Resistance to Mechanical Damage: Moderately susceptible
Bruising Resistance: Resistant
Dormancy Period: Very long

Plant Characteristics

Maturity: Medium-early
Early Development: Good
Flower Color: White

Resistance

Golden Cyst Nematode (Ro1 and Ro4): Susceptible
Golden Cyst Nematode (Ro2 and Ro3): Susceptible
White Cyst Nematode (Pa2): Susceptible
White Cyst Nematode (Pa3): Susceptible
PVY (Potato Virus Y): Resistant
PVYn (Potato Virus Yn): Moderately resistant
Common Scab: Moderately resistant
Powdery Scab: Susceptible
Tuber Late Blight: Susceptible
Foliage Late Blight: Susceptible
Spraing: Moderately resistant
Metribuzin: Resistant
Fusarium: Moderately resistant
Erwinia: Moderately resistant

Harvest and Dormancy

Harvest: Wait at least three weeks after haulm kill before harvesting, as Constance is sensitive to mechanical damage but resistant to bruising. Avoid applying CIPC (Chlorpropham) during harvest, as the skin is sensitive to chemical damage. If chemical sprout inhibitors are required, a gaseous formulation is recommended.

Storage: Constance has a medium dormancy period and can be stored until March at temperatures of 4–5°C.

Growing Recommendations

Certified seed potatoes should be used; seed cutting is not recommended.
For seed size 35–45 mm: in-row spacing should be 14–17 cm
For seed size 45–55 mm: in-row spacing should be 17–18 cm
For seed size 55–60 mm: in-row spacing should be 18–23 cm
All equipment should be disinfected before planting
Take precautions to avoid mechanical damage
Seed tubers should be treated with appropriate products
Crop rotation should be taken into consideration