

Sirtema is a variety of potato that is harvested early. Productive and which gives a proportion of large size quite important, this potato nevertheless has a low aptitude for long storage. It produces tubers with short oblongs and fairly regular shape.
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Tubercle : Oblong short, fairly regular, eyes rather superficial, yellow skin, yellow flesh
Flower: White upperside, purplish-red underside, partially pigmented flower bud
Germ: Purplish red, spherical, weak hairiness
Plant: Fairly low size, spreading habit, leafy type.
Stem: Weak pigmentation, with slightly pronounced, straight wings.
Leaf: Frankly green, moderately divided, closed; leaflet large, oval rounded (I = 1.70); blade semi-blister.
Flowering : Not very abundant.
Fruiting: Rare.
Yield of sirtema potato seedling: 89% Bintje.
Calibration: Proportion of large tubers: strong.
Susceptibility to disease: Foliage downy mildew: sensitive.
Downy mildew: moderately sensitive.
Warty gall: not attacked. Common scab: not very sensitive.
Virus X: R.A.S. Virus A: R.A.S. Virus Y: sensitive.
Winding: moderately sensitive.
NEMATODE ROI -4: R.A.S.
Internal defects of the tuber: Not very sensitive to rust stains, quite sensitive to the hollow core and moderately sensitive to ashen stains.
Susceptibility to Pegerming: Relatively insensitive.
Vegetative rest of the sirtema potato plant: Very short.
Culinary quality: Good cooking performance, culinary group B, blackening after cooking: zero, frying coloring: R.A.S.
Dry matter content: Low.
Suitability for preservation: Low.
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