A medium late top-performing starch variety with a very high yield. Through its rapid youth development and its late maturity, Jonas delivers consistently high starch yields. It shows high resistance to Pa 2 (9) and Pa 3 (8). Additionally, it has good resistances to PVY, phytophthora and rhizoctonia.


Maturity Medium late
Plant type Intermediate
Growth habit Semi-upright
Color of flower White
Foliage development Rapid
Number of tubers Medium, High
Dormancy High

Tuber characteristics

Tuber shape Round oval, Round
Flesh color White
Eye depth Medium, Deep
Skin color Yellow
Skin characteristic Rough


Nematodes Ro 1, Pa 2 (8), Pa 3 (5)
Leaf blight High
Tuber blight High
Rhizoctonia High
Black leg Medium, High
Common scab Medium, High
Second growth High
Damages Medium
Bruising Medium
PVY Very high

Yield and Quality

Market outlet Starch
Yield Very high
Share oversize Medium
Share undersize Low
Dry matter content High
Dry matter yield Very high