taxonomic position domain : eukaryota kingdom : viridiplantae phylum : spermatophyta class :...
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Papaya
Dalya Badawee
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Taxonomic Position
Domain : Eukaryota Kingdom : Viridiplantae Phylum : Spermatophyta Class : Dicotyledonae Order : Violales Family : Caricaceae Scientific name : Carica papaya
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Origin: The papaya is believed to be native to southern Mexico and neighboring Central America. It is now present in every tropical and subtropical country.
Soils: Papayas need a light, well-drained soil, Papayas do not tolerate salty water or soil, pH(5-7), lime application is necessary to increase growth and yield.
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Southern Asia and East Indies: Kapaya, lapaya and tapaya
Australia ,West Indies and New Zealand : paw paw
Brazil: Mamao, or tree melonSpain: lechosa, papaya, fruta bomba.France: Papaya.Vietnam: Du duVenezuela: Lechoso (milky)Cuba: Fruita bomba.
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Radiation: Papaya is a sun-loving plant. Temp. : Optimum temperature for growth is
between 21°C to 33°C. Pruning: Papayas do not need to be pruned,
but some growers pinch the seedlings or cut back established plants to encourage multiple trunks.
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Tree
• Papaya is a short-lived , fast growing, soft wooded perennial .
• It has an extensive root system, erect growth and does not branch.
• It can grow up to a height of 8-10 m. The trunk is hollow green or deep-purple 30-40 cm or more thick at the base and roughened by leaf scars.
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Papaya tree.. with hearts in the trunk
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Leaves The leaves are spirally arranged in a terminal
cluster, simple, on petioles 30-70 cm long. The leaves are rounded in outline, 60-90 cm in
diameter, palmately 7-9 lobed. The margins of the lobes are very variable, and
range from entire to undulate to deeply lobed. They are hollow, succulent, green or more or less
dark purple. The life of a leaf is 4 to 6 months.
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FlowersThese plants are dioecious.The five- petalled flowers are fleshy,
waxy and slightly fragrant.Short-stalked flowers, clustered on
panicles 5 or 6 feet long (1.52 or 1.83 meters) .
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FEMALE FLOWER Are relatively large and rounded at
the base. They have a stigma but lack
stamens. They generally must receive pollen in order to set fruit.
Pollen can be carried by wind or by insects.
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MALE FLOWER Are thin and tubular. They have perfect structure (i.e.,
they contain both male and female organs), but small.
Male flowers are usually borne on a long flower stalk (peduncle).
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HERMAPHRODITE FLOWER• Are intermediate between female and
male flowers in size and shape.• They are less bulbous than female
flowers, but not as thin as male flowers.• They have perfect structure with
functional stigma and stamens and usually are self-pollinating.
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Fruit There are two types of papayas,
Hawaiian and Mexican. Hawaiian fruit generally weight about
1 pound , the plants grow taller than 8 feet.
Mexican papayas weight up to 10 pounds.
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Papaya fruit
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CULTIVARS
1. Kamiya.2. Mexican Red.3. Mexican Yellow.4. Solo.5. Sunrise (Sunrise Solo (.6. Sunset (Sunset Solo).7. Vista Solo.8. Waimanalo (Waimanalo Solo, X-77 ).
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Growth and Development
Papaya trees may live up to 25 years . Vegetative growth It takes about (8-10) weeks
after sowing before seedlings. Reproductive growth New flower buds are
formed at leaf axils every two to three days. The time from bud initiation to flower anthesis ranges from 46 to 80 days.
fruit maturing 4-5 months after flowering.
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Tree spacing varies from 5 to 7 ft (1.52 to 2.13 m) between plants in rows 8 to 11 ft (2.44 to 3.35 m) apart.
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Harvest• Papayas are ready to harvest when most of
the skin is yellow-green.• Mature fruit can be stored at 45° F for about
3 weeks.• In the West Indies, young leaves are cooked
and eaten like spinach.• In India, seeds are sometimes used as an
adulterant in whole black pepper.
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The end