Butte

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GENERAL

• Origin & Breeding: bred by the USDA in Aberdeen, Idaho, from the cross (A492-2 x Norgold Russet), in 1963.
• Year registered in Canada: 1992
• Registration number.: 3638
• Maturity: medium late

BOTANICAL FEATURES

• Plants: medium sized, erect to spreading; stems green with light red-purple mottling; wings moderately prominent; nodes not swollen.
• Leaves: medium green, open, moderately pubescent; midribs slightly pigmented on top, moderately pubescent.
  Terminal leaflets: oval; acuminate tip; base lobed, usually symmetrical.
  Primary leaflets: three to four pairs, oblong, fairly symmetrical.
  Secondary and tertiary leaflets: numerous.
• Flowers: numerous, blooms early and for a long period; light mauve corolla with white tips; yellow-orange anthers; buds green with red-purple traces; calyx often red-purple at base, moderately pubescent.
• Tubers: long, ends rounded, smooth; tannish brown skin, medium light russet with fine pattern; shallow eyes, evenly distributed, becoming pink when exposed to light; white flesh.
• Sprouts: conical; base very weakly red-purple coloured, strongly pubescent; apex not pigmented, very strongly pubescent; semi-open habit.

AGRICULTURAL FEATURES

High yielding variety; tubers detach easily from stolons; resistant to hollow heart; very resistant to injuries due to the herbicide metribuzin; fair storability, medium dormancy period; high specific gravity.

• Utilization: good for boiling and baking; good for french frying but sugars develop during storage producing dark colour.
• Chief Markets: count carton trade as a baker, processing.

REACTION TO DISEASES

Resistant: late blight (field resistant), common scab, tuber net necrosis caused by leaf roll.
Highly resistant: PVX.
Moderately resistant: early blight on tuber.
Moderately susceptible: fusarium dry rot, verticillium wilt, early blight on foliage, PVY.
Susceptible: leaf roll, blackleg.

References: 1, 6.

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