Calypso (B74)

CalypsoTM (B74®)

The B74 mango variety was selected by the department and Just Avocados Pty Ltd.

Perfection Fresh Australia Pty Ltd has recently been appointed as the new commercialisation partner to market B74 under the Calypso™ trademark. This variety is protected by plant breeder's rights and enquiries should be made to Perfection Fresh Australia.

The variety combines taste characteristics of Kensington Pride with a smaller seed, fibreless flesh and improved shelf life.

Calypso™ is a monoembryonic variety that grows as an open, upright tree with moderate vigour. Medium-sized fruit (350 to 500 g) matures mid-to-late season and the skin develops high levels of red pigment when exposed to sunlight. The ripe flesh is firm, has a smooth texture with low fibre and is pale yellow in colour.

Flower characteristics

  • panicle* length - 30-50 cm
  • panicle width - 20 cm
  • hair density - few
  • panicle colour - pink
  • wilted petals - pink.

Fruit characteristics

  • fruit shape - round
  • ground colour - yellow
  • blush colour - pink
  • weight – 350-500 g
  • average length - 95 mm
  • average width - 90 mm
  • average depth - 80 mm
  • lenticel size - small
  • lenticel colour - yellow
  • pulp colour - yellow
  • firmness - medium to soft
  • stem end shape - level
  • beak shape - medium
  • flavour - sweet mild
  • embryo type - monoembryonic*.


Calypso™ is a monoembryonic variety, which means that the seeds, if planted, will not produce seedlings that fruit true to type. For this reason, Calypso has to be propagated vegetatively and grafting is the preferred method. In Australia, Kensington Pride is the most commonly used rootstock.

Planting density

Planting densities for Calypso are generally higher than for Kensington Pride and R2E2. CalypsoTM is best planted 3 to 4 m between trees and 8 m between rows (312 to 412 trees/ha).

Pruning and shaping

Calypso™ is not a vigorous variety and does not require excessive pruning. During the early years of growth, branches should be tipped twice yearly to maximise the number of fruiting terminals and produce well-branched limbs that maximise the number of bearing terminals. Bearing trees require an annual post-harvest pruning to thin the outer canopy and remove any branches deformed by heavy crop loads. Skirting up to a height of about 1 m will allow machinery access under the canopy.


Calypso™ is a consistently heavy cropping variety in most growing regions. It does not usually suffer from the annual yield fluctuations that Kensington Pride does, particularly in the tropical northern regions. An 8- to 9-year-old tree will yield approximately 70 kg of fruit.

Pest and disease status

Calypso is moderately susceptible to anthracnose (Colletotrichum gloeosporioides) and may also be affected by stem end rots (Botryosphaeriaspp., and Lasiodiplodia theobromae).

Irwin is affected by major insect pests such as mango scale (Aulacaspis tubercularis), mango shoot caterpillar (Penicillaria jocosatrix) and tipborer (Chlumetia euthysticha), fruit flies and planthopper (Colgaroides acuminata).