CalWhite

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General

• Origin & Breeding: bred at the University of Idaho from the cross (Pioneer x BC8370-4) in Aberdeen, Idaho (USA) and released in 1997 by the California and Idaho Experiment Stations and the USDA.
• Year registered in Canada: 2001
• Registration number: 5299
• Maturity: mid to late season

Botanical Features

• Plants: tall, semi-erect; stems thick, weakly pigmented; wings prominent, waved double; very slightly swollen nodes, not pigmented.
• Leaves: medium green, semi-open, moderately pubescent; midribs and petioles not pigmented.
  Terminal leaflets: medium ovate; apex acute; base cordate and slightly asymmetrical; weakly wavy margins.
  Primary leaflets: four to five pairs; narrowly ovate; apex acute; base cordate, very slightly asymmetrical.
• Flowers: numerous, medium white corolla, moderately prominent star; orange anthers; buds slightly pigmented; long peduncle, weakly pigmented.
• Tubers: oblong; large; rough to netted buff skin; medium deep eyes, intermediate in number, evenly distributed; slightly prominent eyebrows; white flesh.
• Sprouts: broad cylindrical, purple, weakly pubescent; base very strongly pigmented; apex weakly pigmented.

Agricultural Features

Very high yielding variety with few tubers per plant. Spacing between plants should be very close to avoid oversize tubers. Performs well in hot climates; may form heat sprouts under high soil temperatures. Good resistance to growth cracks, second growth, shatter bruises, hollow heart and heat necrosis; moderately resistant to blackspot bruises; susceptible to net necrosis caused by leafroll. Good storability; short dormancy period; medium high specific gravity.

Remark: the herbicide metribuzin should not be used with this variety as it is highly susceptible to it.

• Utilization: excellent for baking and french frying.
• Chief Markets: fresh market, processing of french fries.

Reaction to Diseases

Moderately resistant: early dying.
Moderately susceptible: PVY, early blight, verticillium wilt.
Susceptible: common scab, leaf roll, storage soft rot.

NOTE: shows poor symptoms expression of PVY.

References: 1, 6, 9.

Send your comments to cfia.potatosection-sectiondespommesdeterre.acia@canada.ca regarding potato variety descriptions.