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
Co-op 17
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 34

Co-op Release Description

Origin Derived from a cross made in 1960 at the Cream Ridge Research and Development Center, Rutgers University. First selected in 1967 by E.B. Williams on the Throckmorton Farm of Purdue University, Lafayette, Indiana and tested as TNR10T11.

Tree Standard, round-top tree, spreading growth habit, moderately sturdy branches with 90 degree crotch angles. Similar to 'Jonathan'. Exhibits a high degree of branching and smaller diameter wood than desirable, but not excessive. A small amount of bare wood tends to develop at the base of branches.

Bloom period Late-midseason.

Productivity Annually moderate to heavy producer, very little biennial tendency.

Harvest period October 5 to 15 at Lafayette, Indiana.

Fruit size 2-1/2 to 2-7/8 inches.

Fruit shape Round or short-conic to conic; oblong on young trees.

Skin Washed, 60 to 80% light to medium red over a pale green-yellow ground color at harvest. Ground color matures to pale or light yellow; slightly tough, moderately thick skin.

Flesh White to cream, slightly crisp, firm, medium grained.

Favor Spritely to moderately acid at harvest, reduced to moderately acid in storage. Slightly spicy, moderately full-flavored (similar to 'Jonathan), moderately juicy.

Storage Retains texture and quality for three months in refrigerated storage.

Disease reaction
Field immune.
Rust Highly resistant.
Mildew Moderately resistant.
Fire Blight Highly resistant.

Comments Good annual cropping of attractive, mostly conic-shaped fruit with similar quality and flavor to 'Jonathan'; very good overall disease resistance. Co-op 34 appears to be adapted to the Midwest and other 'Jonathan' growing areas.

J.A. Crosby, Jules Janick, P.C. Pecknold, S.S. Korban, S.M. Ries, J. Goffreda, and A. Voordeckers. 1993. Co-op 32 to 38: Seven disease-resistant apple selections released for advanced testing. Purdue A.E.S. Sta. Bul. 658.

Co-op 34

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Co-op Summary Table
Co-op Bloom Date

Brief Description
Co-op Release Description

Pedigree of Co-op 34

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