Yona

MULTI PURPOSE VARIETY
Environmental friendly

YONA is a pale red skin variety producing very big tubers regular size.
The crop cycle of YONA is rather long but its yield is very high, superior to Désirée.
Excellent at storage, gifted of some key diseases resistances such as blight (very high resistance) which makes it an “environmental friendly “variety.
YONA is a variety Very well adapted to the so-called “traditional markets".

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PLANT

FOLIAGE MATURITY	LATE
EMERGENCE	FAIRLY FAST
PLANT VIGOUR	HIGH

TUBER

SKIN COLOUR	RED
FLESH COLOUR	PALE YELLOW
TUBER SHAPE	LONG OVAL
SHAPE UNIFORMITY	FAIRLY GOOD
EYE DEPTH	FAIRLY SHALLOW
TUBER SIZE	VERY LARGE
TUBER SET	MODERATE

QUALITY

YIELD	HIGH
DRY MATTER CONTENT	FAIRLY HIGH (20-22%)
COOKING TYPE	B-C
DISINTEGRATION	SLIGHT
AFTER COOKING DARKENING	VERY SLIGHT
FRYING COLOUR at harvest	GOOD
STORAGE ABILITY	HIGH

DISEASES

RESISTANCE TO FOLIAGE LATE BLIGHT	HIGH
RESISTANCE TO TUBER LATE BLIGHT	FAIRLY HIGH
RESISTANCE TO PITTED COMMON SCAB	FAIRLY LOW
RESISTANCE TO NETTED COMMON SCAB	FAIRLY LOW
RESISTANCE TO PVY	HIGH
RESISTANCE TO PVYntn	FAIRLY HIGH
RESISTANCE TO PCN G.rostochiensis (Ro1-4)	FULL
RESISTANCE TO PCN G.pallida (Pa2-3)	NULL
RESISTANCE TO WART pathovar 1	FULL
RESISTANCE TO EARLY BLIGHT	MODERATE

PHYSIOLOGY

DORMANCY	FAIRLY LONG
RESISTANCE TO EXTERNAL DAMAGE	MODERATE
RESISTANCE TO INTERNAL DAMAGE	HIGH
RESISTANCE TO INTERNAL RUST SPOT	FAIRLY HIGH
RESISTANCE TO DESPROUTING	MODERATE