Manilkara zapota

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© Manuel Bertomeu
Chicle extraction from trees in Mexico
© Anthony Simons
Fruit
© Trade winds fruit

Local names:
Creole (sapoti), English (chickle gum,common naseberry,sapodilla,chicle tree,naseberry), Filipino (chico), French (sapotilleir,sapotillier commun,sapotille), German (Breiapfelßaum,Sapodilla,Kaugummißaum), Hindi (chiku), Indonesian (sawo londo,ciku,sawo m

The sapodilla is a large, evergreen, forest tree more than 30 m in height and with a diameter up to 1.5 m; under cultivation it varies between 9 and 15 m, depending on location, and generally does not exceed 50 cm in diameter. It produces a dense crown and a characteristic branching system (sympodial), in which the young branches are arranged horizontally. Bole cylindrical and long, especially in forest-grown individuals; bark dark brown and deeply fissured, forming small rectangular pieces. The tree has an extensive root system.

Leaves spirally arranged and clustered at the shoot tips, simple, elliptic or oblong, apex obtuse to shortly acuminate; coriaceous, shining, glabrous when mature. Secondary veins make a wide angle with the midrib.

Flowers greenish, solitary, cyathiform or campanulate, with a brown pubescent peduncle; 6 sepals, 6 corolla lobes.

Fruit an ovoid to globular berry with a rough brown skin, containing 1-12 shining, brown or black seeds (frequently 5), surrounded by a brownish, sweet, juicy, scented flesh.

‘Manilkara’ is a common name for a member of the genus in Malabar. The common name ‘sapodilla’, by which the fruit is known, is taken from the Spanish ‘zapotillo’ meaning ‘small zapote’.

Ecology

M. zapota is a species of the lowland rainforest. Trees grow well in a wide range of climatic conditions from wet tropics to dry cool subtropical areas. But they prefer a moist hot climate similar to that found at medium to low elevations in tropical areas, such as in coastal regions. Fruiting is not adversely affected by heavy rainfall, but high temperatures (42-43 deg. C) are harmful. Trees prefer full sunshine and are fairly hardy and resistant to wind damage when mature. Young trees are frost tender and may be killed at freezing point or below, whereas mature trees can withstand short periods of temperatures of about -3 deg. C.

Native range
Brazil, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Venezuela

Tree management

Trees are spaced 7-12 m apart, depending on the growth habit of the cultivar. They require irrigation during the dry season for the 1st 3-4 years, after which they are able to withstand drought. If necessary, young plants should be staked. Response to fertilizer is good, and 3-4 small applications a year of a nitrogen-containing fertilizer are beneficial. Pruning to shape the young trees is practised for the 1st 5 or 6 years. Planting a strong windbreak is also advised to protect against prevailing winds.

Seed storage behaviour is intermediate; viability can be maintained for 24 months in air-dry storage at 5 deg. C.

M. zapota is a species of the lowland rainforest. Trees grow well in a wide range of climatic conditions from wet tropics to dry cool subtropical areas. But they prefer a moist hot climate similar to that found at medium to low elevations in tropical areas, such as in coastal regions. Fruiting is not adversely affected by heavy rainfall, but high temperatures (42-43 deg. C) are harmful. Trees prefer full sunshine and are fairly hardy and resistant to wind damage when mature. Young trees are frost tender and may be killed at freezing point or below, whereas mature trees can withstand short periods of temperatures of about -3 deg. C.

Commercial varieties are cultivated by vegetative means: air-layering, marcoting, inarching and grafting. For air-layering, 2-year-old branches are used, 45-60 cm long, 1 cm in diameter and suitably leafy. For grafting, seedlings, or those of Mimusops kauki or Madhuca spp. (related genera of the same family) are used as stock. Saddle grafting and budding are also practised. Deep cultivation followed by harrowing is recommended before planting. 

Seeds germinate after about 30 days without any treatment and with up to 80% success rate; they exhibit an epigeal type of germination. The seeds for rootstock are sown in a sandy seedbed about 2 cm apart and at a depth of about 1 cm. After a few months, the seedlings are transplanted into polybags. They grow very slowly; even with nitrogen application rootstocks are not ready for grafting for 2-3 years.

Poison: Seeds contain hydrocyanic acid and should be removed before eating the fruit.

 M. zapota is mainly cultivated for its fruit, which is highly prized and considered one of the best in Central America. It is eaten raw or made into jam, preferably when slightly overripe, and in Cuba and Brazil it is often made into a sherbet. The fruit keeps for about 6 weeks in a refrigerator at around 0 deg. C. The juice may be boiled into syrup or fermented into vinegar.

Apiculture: Honeybees are known to collect nectar from the flowers.

Timber: The valuable wood is homogenous, deep red in colour, very hard, strong, tough, dense, resistant and durable. It is suitable for heavy construction, furniture, joinery and tool handles.

Tannin or dyestuff: Tannin from the bark is used to tan ship sails and fishing tackle.

Medicine: A leaf decoction is taken for fever, haemorrhage, wounds and ulcers; for neuralgia, leaf with tallow is applied as a compress on the temples. Seeds are antipyretic, and when ground with water they act as a diuretic. The plant is a source of sapotin, a glucoside used in medicine as a febrifuge. In Indonesia, the flowers are used as one of the ingredients of a powder that is rubbed on the body of a woman after childbirth. In Cambodia, tannin from the bark is used to cure diarrhoea and fever.

Ornamental: M. zapota is widely cultivated as an ornamental.

Latex or rubber: Wild and cultivated trees in America are tapped for their milky latex, which coagulates into chicle, the principal constituent of chewing gum before the advent of synthetics. In recent years, synthetic substitutes have been replacing chic