Papaya Paw paw Papaw Family Caricaceae GenusCarica Speciespapaya.
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Transcript of Papaya Paw paw Papaw Family Caricaceae GenusCarica Speciespapaya.
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PapayaPaw paw
Papaw
Family Caricaceae
GenusCarica
Species papaya
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Papaya Readings(On web page)
• Nishina et al., 2000. – Papaya Production in Hawaii.
– CTAHR, F&N-3.
• Manshardt, 1999. – ‘UH Rainbow’ Papaya. A High-Quality Hybrid with
Genetically Engineered Disease Resistance.
– CTAHR, NPH-1
• Kempler and Kabaluk. 1996. – Babaco (Carica pentagona Heilb.): A possible crop for the
greenhouse.
– HortScience 31:785-788.
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- Tall
- Herbaceous
- Short-lived
- Large leaves
- Flower in leaf axils
- Seed propagated
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- Up to 10 lb.
- Seed in cavity
- Yellow, orange, pink, or red flesh
- High vitamin A & C, and potassium
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Proteolytic enzyme extracted from latex
- Meat tenderizer
- Cosmetics
- Leather industry
- Medicinal uses
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Carica• 20 species
• papaya– Lowland cultivated spp– Not found outside
cultivation– Perhaps hybrid form– Only polygamous spp – Most important
commercially
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Other Cultivated Carica
• Highland species– Common in upland Valleys of Ecuador
and Colombia– Taste different, less sweet– Soups, stews, sweets, fresh– Genes for breeding (cold/disease
resistance)
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Other cultivated Carica
• Hybrid types - Babaco– Most commercially advanced – Seedless - parthenocarpic– Large fruit– Fresh or stewed– Vegetatively propagated
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Origin of Papaya
Taken into Asia Taken into Asia tropics in the 1600stropics in the 1600s
In Pacific In Pacific IslandsIslands by 1800by 1800
Domesticated Domesticated somewhere somewhere
between between southern Mexico southern Mexico
and and GuatemalaGuatemala
Cultivated Cultivated papayapapaya
Carica sppCarica spp
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Origin of Carica papaya
• Tropical America– Southern Mexico– West Indies
• Other spp: Mexico - Argentina
• Spread via seed– 1600s in Asian tropics– By 1800 common in Pacific
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Papaya Production in the World
0
1000
2000
3000
4000
5000
6000
1,0
00s m
t
1965 1970 1975 1980 1985 1990 1995 2000
Three-fold increase since 1965
FAOSTAT database, 1965 - 2000
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Papaya Production in thePapaya Production in theWorldWorld
0
1000
2000
3000
4000
5000
6000
1,00
0s m
t
1965 1970 1975 1980 1985 1990 1995 2000
Papaya Production inPapaya Production inAfricaAfrica
0
500
1000
1500
1,00
0s m
t
1965 1970 1975 1980 1985 1990 1995 2000
Africa
Two-fold+ increase
Papaya Production in AsiaPapaya Production in Asia
0
500
1000
1500
2000
1,0
00s
mt
1965 1970 1975 1980 1985 1990 1995 2000
Asia
Three-fold increase
Papaya Production in thePapaya Production in theAmericasAmericas
0
500
1000
1500
2000
2500
3000
1,00
0s m
t
1965 1970 1975 1980 1985 1990 1995 2000
Americas
Five-fold increase3 fold increase
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Papaya per Capita Production in the World
00.10.20.30.40.50.60.70.80.9
1
Per
Cap
ita
Pro
du
ctio
n
(kg/
per
son
)
1965 1970 1975 1980 1985 1990 1995 2000
FAOSTAT database, 1965-2000
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World Production of Papaya
Region 1,000 mt %
Africa 1,228 21%
Asia 1,727 29%
Americas 2,923 50%
USA 23 < 0.5 %
Total 5,901
FAOSTAT database, 2000-2002
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World Production of Papaya
Region Country (1,000 mt)
Africa Nigeria (748), Ethiopia (215), Congo(210)
Asia India (700), Indonesia (484)
Americas Brazil (1,476), Mexico (745)
FAOSTAT database, 2000-2002
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World Yields of Papaya
Region Mt/ ha
Africa 10.2
Asia 11.7
Americas 30.3
USA 32.9
FAOSTAT database, 2000-2002
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USA Production• Most in HawaiiProduce 23,000 MTMost exported to mainland USA, Canada, and JapanProduction decrease since 1989 due to Papaya ringspot
0
5
10
15
20
25
30
35
1,0
00S
metr
ic t
on
s
1965 1970 1975 1980 1985 1990 1995 2000
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Fruiting of the PapayaFruiting of the Papaya
• Fruit hang along trunkFruit hang along trunk• Flower in leaf axils Flower in leaf axils –Most are dioeciousMost are dioecious
– Some are hermaphroditic Some are hermaphroditic or perfect floweredor perfect flowered
– Five classes of flowersFive classes of flowers
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Type I or Pistillate Flower
or female flower
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Female Papaya Flower
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Type II or Pentandria Flower
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Type III or Intermediate Flower
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Type IV or Hermaphroditic Flower
or bisexual or perfect flower
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Hermaphroditic Papaya Flower
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Type V or Staminate Flower
or male flower
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Male Papaya Flower
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Importance of Sex
• Female– Fruit is an enlarged ovary
• Male – Need pollen for pollination
• Flower type influences– Thickness of flesh– Fruit shape
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Inheritance of Sex• One locus, three alleles– M1 male
– M2 hermaphrodite or bisexual
– m female
• Homozygous dominant lethal– M1M1, M1M2 and M2M2 lethal
– M1m = male M2m = bisexual
– mm = female
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Seedlings segregate for sex
Need to maximize the number of productive plantsHermaphroditic varieties maximize hermaphroditesDioecious type maximize females
• Plant multiple seedlings per space and rogue wrong sex
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Herm aphroditic Variety
M 2 M 2Lethal
M 2 mHerm aphrodite
M 2 mHerm aphrodite
m mFem ale
Herm aphrodite x Herm aphroditeM 2 m x M 2 m
- 2/3 hermaphroditic and 1/3 female
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Maximize Bearing PlantsHermphroditic variety
• Want hermaphroditic plants
• Rogue out females 1 per space = 67% 2 per space = 89% 3 per space = 96%
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Female or Dioecious Types
• Need one male for every 12-15 females – 6-8% males
• Fruit is better if good pollination– Pollination by wind and moths
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Dioecious Variety
m mFem ale
M 1 mM ale
Fem ale x M alem m x M 1 m
- 1/2 female and 1/2 male
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Maximize Bearing PlantsDioecious variety
• Maximize females
• Rogue out males 1 per space = 50% 2 per space = 75% 3 per space = 87.5% 4 per space = 93.7%
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Sex Can Change!
• Too cool, wet, and high N Female Stamens become carpel like
• Too hot, dry, and low N Male Ovaries fail to develop
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Climatic Restrictions
• Optimal temperature 22 - 26 C Sex expression shifts Flavor poor if cool Die if less than -1C Die if greater than 44C Long growing season
• Susceptible to wind damage
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Cultural Restrictions
• Need direct sunlight– Poor flavor if shaded
• Well drained soils– Sensitive to waterlogging
– Susceptible to Phytophthora
• Sensitive to saline conditions
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Diseases of Papaya
• Papaya ringspot virusMost importantLimiting factor in many areas of world
• Mildew• Anthracnose• Root rot, Phytophthora (replant sites)• Nematodes
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Papaya Ringspot Virus
• Vectored by aphids– Leaf mottling and
distortion– Reduce growth, yield
• So severe in Florida that plants are grown as annuals
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Papaya Ringspot Virus
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Papaya Ringspot Virus
• UH Sunup and UH Rainbow– GMOs (Genetically Modified Organism)
Control via resistant varieties
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Insect Pests
• Fruit flies
• Webworms
• White flies
• Thrips
• Mites
• Fruit spotting bugs
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Fruit flies
Lay eggs in fruit
Larva feed in fruit
Cause rot
Heat treat to kill in fruit
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Papaya VarietiesTwo Major Types
• Hawaiian - Solo typesHermaphroditicSmaller fruit, about 1 lb
• Mexican or “fruta bomba”DioeciousLarger fruit, up to 10 lbs
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Hawaiian VarietiesHermaphroditic Solo types
• Common in US markets– Fruit small, firm, sweet– Plant smaller ~ 8’– Sex expression more stable
• Series of inbred seed lines developed in Hawaii– Most widely grown is “Sunrise” variety
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Mexican Varieties
• Locally available in many tropical regions
• Much larger fruit
• Flavor generally less intense
• Frequently dioecious
• Not as good for shipping
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Establishment
• Propagated by seed Clean off gelatinous coat Dry and plant immediately Warm (80 F), sterile soil Germinate in 2 weeks In 10 weeks ready to transplant
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Site Selection
• “Virgin soil” preferred
• Replant sites– High levels of Phytophthera palmivora– “Virgin soil” technique– Fungicide drench in planting hole– Fallow of 3-5 years
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Planting
• SpacingSingle row, 8’ x 10’
(435 plants per acre)
Double row, 6’ x 6’ x 12’ (850 plants per acre)
• Multiple seedlings per space to maximize bearing plants
– 3 to 5 plants per hole until flowering
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Cropping Cycle
• From planting begin to fruit in 10-12 months– Begins to flower in 4-8 months– Fruit develops in 4-6 months– Possible to grow as annual
• Commercially can fruit for 3-4 years
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Production Practices
• No pruning
• High nitrogen to encourage growth
• May thin fruit to one per cluster to avoid crowding
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Harvesting and Yields
• Climacteric fruit– Harvest yellow green
– Dark green fruit will not ripen
• Potential yield– 100 tons/ha or 40 tons/acre
• Average yield– 15-25 tons/ha or 6-10 tons/acre
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World Yields of Papaya
Region Mt/ ha
Africa 10.2
Asia 11.7
Americas 30.3
USA 32.9
FAOSTAT database, 2000-2002
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Post Harvest
• Storage– 1-3 weeks @ 7-10C
• Fruit fly infestation treatment– Hot water: 20 minutes @ 120F– Hot air: heat fruit flesh to 117F
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International Markets
• Major exporting countries– Mexico to USA and Canada– Brazil to Europe– India to Middle East– Many others
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Any Questions about Papaya?Any Questions about Papaya?