PRI Disease Resistant Apple Breeding Program

Co-op 1
Co-op 3
Sir Prize
Co-op 6
Co-op 7
Co-op 8
Co-op 9
Co-op 10
Co-op 11
Co-op 12
Co-op 14
Co-op 15
Co-op 16
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Co-op 18
Co-op 19
Co-op 20
Williams' Pride
Co-op 24
Scarlett O'Hara
Co-op 26
Co-op 27
Co-op 28
Pixie Crunch
Co-op 34
Co-op 35
Co-op 36
Co-op 37
Co-op 40
Co-op 41
Co-op 42
Co-op 44

Co-op 28

(PRI 2929-104 = PRI 1982 x 'Prima') (Korban et al. 1990)

Brief Description

  • Fruit: 60 to 70 mm (2-1/4 to 2-34 in.); variable shape-round to oblate-conic; green-yellow to yellow ground color; bright finish; slightly striped, washed, 75 to 90% medium red; occasionally conspicuous lenticels; medium grained, white to cream colored, firm, crisp and breaking flesh; mildly sub-acid, slightly spicy, full, rich flavor; moderately juicy. Retains flesh texture and quality for up to four months in refrigerated storage. Fruit hangs on the tree very well, retaining quality and texture for several weeks on tree. Heavy cropping with strong biennial tendency.
  • Bloom Period: Early to midseason.
  • Season of Maturity: One to one and one-half weeks before 'Delicious'.
  • Tree: Vigorous, upright and spreading, somewhat limber, with blind wood in basal portion of branches. Fruit borne on short to moderate length spurs.
  • Disease Resistance: Field immune to apple scab; moderately resistant to powdery mildew; moderately resistant to cedar-apple rust; highly susceptible to fur. blight.
  • Problems: Limber wood (partially overcome by ability of fruit to hang very well); tendency for reduced fruit size and reduction in flavor with a heavy crop; susceptibility to fire blight.
  • General Recommendation: Suggested for advanced testing in areas where fire blight is not a problem.
Co-op 28

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