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Parentage/Origin
Calypso was raised from a cross between Rapella and Selva, made in
1985 by Dr David Simpson and Judi Bell. Selected in 1986 for its firm,
well-flavoured berries, Calypso (formerly EMR28) was released in the
UK in 1991.
Fruit Quality
The berries are firm with a mid-red colour, glossy skin finish and
have good flavour. They have a regular, conical shape although some of
the primary berries can be irregular at the beginning of the season.
The variety benefits from frequent picking as the fruit tends to
darken once ripe.
Yield and Fruit Size
Yields from everbearer trials in the UK vary considerably from year
to year but typically Calypso will produce a Class 1 yield similar to
Rapella following a spring planting. Trials have shown that Calypso
will have a similar yield irrespective of whether planted in spring or
autumn. Calypso consistently produced a higher proportion of large
berries (>35mm) than Rapella in trials.
Season
The overall cropping season is similar to Rapella although
individual peaks within the season will vary between the two
varieties. In some years spring planting may significantly advance the
season of Calypso relative to an autumn planting, but yield is not
affected.
Plant Characteristics
Plants are moderately vigorous with an upright habit. Runner
production is unusually prolific for an everbearing type and the
runners must be removed regularly during the summer to prevent the
plants from becoming stressed
Disease Resistance
Calypso is moderately resistant to wilt (Verticillium dahliae). It
is susceptible to powdery mildew (Sphaerotheca macularis) but the
symptoms appear mainly on the leaves rather than the fruit.
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