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Co-op 13
type: Dessert
synonyms: Marketed as Redfree
summary: A good summer dessert apple.
identification: Medium tending to large in size and round. Glossy. The base colour is greenish yellow which is blushed to 90% with a bright red. Faint, broken stripes are evident on the unblushed, shaded face. The medium thick, glossy skin is smooth, with medium large, light coloured lenticels. At maturity, the skin has a distinct greasy feel. The stem is medium long, medium thick and set in a wide, moderately deep basin. The calyx is large and partly open with long and pointed petals, set in a shallow, wide and puckered basin. Russetting is not normally present.
characteristics: The flesh is light cream coloured, firm, medium grained, firm, crisp and juicy. Mild flavour and acidity.
origins: This variety comes from an extensive raft of seedlings created as part of a joint programme by Purdue, Rutgers and Illinois Universities of Indiania, New Jersey and Illinois (U.S.A.) respectively to develop a strain of scab resist apples. This specific seedling, coded PRI 2175-7, was created in 1965 at the research station of Rutgers University in 1965 by pollinating Raritan with pollen from PRI 1018 which comes from a complex breeding that includes Melba , Wealthy , Starr , Glengyle Red , Jonathan and Malus floribunda 821 which provided the scab resistant genetics. The seeds were planted at the Hinsley Breeding Orchard of Purdue University's Agricultural Experiment Station in Lafayette, Indiana (U.S.A.) and the seedling was selected for further testing in 1971. Released in 1981.
cultivation: Vigorous, upright tree. Partial tip bearer. Produces moderate crops on an annual basis.
cold storage: Stores up to two months in cold storage.
vulnerabilities: Resistant to blight, and mildew and very resistant to scab and rust.
harvest: Over a span of several weeks starting in the early part of the fourth period.
pollination group: B
pollination peak: 6
ploidism: Diploid. Self sterile.
cold storage weeks: 8
brix: 12
harvest period: 4
hardiness: 4
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