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 36

Co-op Release Description

Origin Derived from a cross made in 1971 at the Cream Ridge Research and Development Center, Rutgers University. First selected in 1980 by E.B. Williams on the Clark Farm Tract of the Purdue University Horticultural Research Farm, West Lafayette, Indiana and tested as CLR13T40.

Tree Moderate vigor, slightly upright, limited branching, sturdy wood, semi-spur type growth habit. Fruit tends to be borne in clusters on relatively short spurs, inside the canopy of the tree. Very desirable growth habit.

Bloom period Late-midseason.

Productivity Moderate to heavy producer with strong biennial fruit bearing tendency. Fruit thinning should be conducted annually.

Harvest period October 15 to 20 at Lafayette, Indiana.

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

Fruit shape Short conic to conic.

Skin Pale green-yellow at harvest with a slight pink blush on the sun exposed surface of the fruit, maturing to pale yellow; thin, tender skin.

Flesh Cream colored, crisp and breaking yet melting, medium grained, juicy flesh.

Flavor Moderately to mildly acid, rich, fruity, full flavor.

Storage Retains texture and quality for 3 to 4 months in refrigerated storage.

Disease reaction
Field immune.
Rust Moderately resistant.
Mildew Highly resistant.
Fire Bight Resistant.

Comments A 'Golden Delicious' seedling maturing a week after its parent with a unique fruity flavor and a high over-all level of disease resistance. Tendency to over-crop if not thinned. Fruit size is smaller than 'Golden Delicious', but storage life is superior.

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 36

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Co-op Summary Table

Co-op Bloom Date

Brief Description

Co-op Release Description

Pedigree of Co-op 36

About PRI