growing tropical fruit & nut trees for the homeowner
TRANSCRIPT
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Growing Tropical Fruit & Nut TreesFor The Homeowner
October 15, 2010UH CTAHR Master Gardening Conference
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Tropical Fruits and Nuts• Successful cultivation is strongly
influenced by:Variety (cultivar)– Most trees are propagated vegetatively:
• grafting, budding, airlayering, cuttings
– Some trees propagated from seed:• papaya, coffee, mangosteen
Growing environment is important.Cultural practices can be important.
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Propagation MethodsRambutan bud grafting
Lychee airlayering
Macadamia grafting Papaya seed germination
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Importance of Pruning and Training Tropical Fruit Trees
• Manage tree size*• Manage flowering
and fruiting• Facilitate Harvesting• Manage disease and
pests
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Lychee: Australia
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Jubilee
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Macadamia (Macadamia integrifolia = smooth shell macadamia)
• All orchards consist of grafted trees on seedling rootstocks
• All cultivars (varieties) developed in Hawaii• Trees begin bearing 4 years after planting• Nuts drop to the ground when mature and are
harvested by hand or mechanically• Nuts are husked, dried and roasted for consumption
& sale
http://www.agroforestry.net/scps/Macadamia_specialty_crop.pdfFarm and Forestry Production and Marketing Profile for Macadamia Nuts (Nagao, 2010)
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Optimum Macadamia Growing Conditions in Hawaii
• Deep, well-drained soil is best but orchards also found on rocky soil
• Rainfall: 60 inches (1524 mm)drier in spring during flowering
• Temperature: Average annual 69 F (20.6)Average maximum 78 F (25.6 C)
Vegetative flushing range 68-86 F (20-30 C)Average minimum 60 F (15.6C)
Flowering range 59-64 F (15-18 C)
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Propagation• Grafting onto seedling rootstocks
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Trees planted into field 8-12 months after grafting. (Varieties: 344, 508, 660, 294, 800, 741, 246)Trees are pruned during first 3 years to produce a well-structured tree with good branching.
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Relatively free of insect & disease problems.Insect pests managed through biological control and frequent harvesting.
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Harvested from the ground (4-5 week harvest intervals and husked within 24 hrs).
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Home Processing of Macadamia NutsHusk and dry in-shell nuts on wire racks for 3-4 weeks.Crack when kernels rattle in the shell.Separate shells and dry kernels in food dehydrator.
2-3 days @100 F4-5 days @ 125 F2 days @ 140 F
*Roast @ 275 F for 20-30 min.
http://www.ctahr.hawaii.edu/oc/freepubs/pdf/F_N-6.pdf
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http://www.ctahr.hawaii.edu/oc/freepubs/pdf/F_N-2.pdfGrowing Lychee in Hawaii
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Best Cultivar for HI: Kaimana• Seedling of Hak Ip
(1965)• Matures June to July• Spreading growth
habit• Flowers in about 4
years after planting• High number of male
flowers produced early in the season with higher proportion of female flowers later in the season
Fruit Wt.
(grams)
Fruit Diam. (mm)
Edible Pulp (%)
Abortive Seeds
(%)
Soluble Solids
(%)20 - 26 30 - 40 71 - 75 40 20 - 24
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Bosworth
Bosworth
Groff
Additional Lychee Varieties for HI
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Natural flowering of lychee, longan and
rambutan in Hawaii can be inconsistent.
• Environmental signals for induction of flowering are not consistent from one year to the next (growing environment is important for consistent production).
• Excessive vegetative growth restricts flowering and are affected by:
Growing location (soil, rainfall)Fertilizer applicationsPruning
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Kaimana Lychee Yields (lbs/tree)Location Tree Age Mean RangePanaewa 1 7 40 13 - 125Panaewa 2 10 49 10 - 111Kurtistown 5 33 6 - 73
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HarvestRest
FloralInduction
andDevelopment
VegetativeGrowth
Prune, oldPanicle removal,irrigate, fertilize
Temp 25-29oCHigh water
Girdle
Temp<25oCLow waterLow N
Temp <15oC? Weeks (4-8) Low Rainfall
Temp >15oCHigh Rainfall
Flowering
Weak Floweringor
Vegetative growth
Crop CycleKaimana Lychee in Hawaii
25o C = 77o F15o C = 59o F
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Pruning and (fertilization) after harvest are employed to stimulate uniform vegetative flushing
Do not over-fertilize at this time.(application of foliar fertilizer may bean option)
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Girdling (cincturing) of branches
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Effect of Winter Tip Pruning on Flowering of Kaimana Lychee
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Panicles emerge from pruned shoot.
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Erinose mitesProblems Encountered
Birds
Fruit fly
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Lychee Growing Tips
‘Kaimana’ is the desired variety due to its consistent flowering under Hawaii growing conditions.
Concentrate fertilizer application during fruit development eg. 14-7-28+, 8-6-32+.
Prune soon after harvest.Flowering occurs in response to low temperatures that
coincide with maturation and regrowth of terminal shoots. Dry weather enhances flowering but does not substitute for
low temperatures.Autumn girdling can enhance flowering.Avoid applying high amount of nitrogen.Avoid fertilizer application after September.Keep historical information on yield (flowering) and fertilizer
applications to estimate future fertilizer applications.
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Longan Production in Hawaii Cultivars Grown: Biew Kiew (commercial)
Chompoo, Egami (home garden)
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Longan Flowering• Factors involved in natural flowering similar to lychee,
therefore, trees should be managed similarly. • Egami tends to flower and produce more consistently
for the homeowner.• Flowering induced with soil application of potassium
chlorate.• Rates: 250 to 500 g/tree.• Fruit thinning maybe necessary particularly with some
varieties.• Trees tend to be less responsive to subsequent
applications.• Sodium hypochlorite and calcium hypochlorite can
induce some flowering.
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http://www.ctahr.hawaii.edu/oc/freepubs/pdf/NPH-5.pdf
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Flowering Biew Kiew Trees
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Fruit Thinning of Panicle
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ControlEgami
Sodium HypochloriteEgami Treated: 1/28/03
6/24/03
6/24/03
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Rambutan Production in Hawaii
Cultivars Grown : Jitlee, Binjai, R9, R167, Silengkeng,R156, R134, R162
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Rambutan Flowering in Hawai’i• Occurs in response to water stress• Symptom = Leaf curling• Main season (July to August)• Minor season (April to May)
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0
20
40
60
80
100
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Tem
pera
ture
(°F)
Hilo Max
Hilo Min
Chanthaburi Max
Chanthaburi Min
Monsoon season
0
5
10
15
20
25
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Prec
ipita
tion (in
)
HiloChanthaburi
Chanthaburi (Thailand) vs Hilo, HI
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Flowering and Fruit Set of Rambutan In Hawaii
• Lack of pollination results in development of deformed fruits.
• Cultivars planted in HI produce few male flowers for pollination.
• Strategies to enhance development of male flowers important for production.
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Deformed Fruit
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Male (male tree)
Hermaphroditic male (very few present < 0.1%)
Hermaphroditic female(majority of flowers)
Flowering rambutan tree
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female
male
Silengkeng cultivar(pollinator)
(Produces male & female flowers)
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Citrus• How can I make my citrus fruits
sweeter? Fertilizer???
–Variety–Cultural practices–Environment
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Combined Effects of Ecological Factors on Citrus Fruit Qualities.
Soule, J and W. Grierson (1978). Citrus Maturity and Packinghouse Procedures. IFAS, University of Florida.
HUMID TROPICSWarm Nights, High Rainfall
High Sugar, High JuiceThin Peel, Poor Color, Fungal Blemishes
Brilliant Color, Minimal Surface Blemishes, Low Sugar, High acid, Thick Peel
ARID DESERT Cool NightsLow Rainfall
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Propagation: Bud Grafting
TangerineOrange
Cleopatra mandarin, Heen Naran, Rangpur lime, Citrus sunki
Grapefruit Cleopatra mandarin, Heen Naran, Rangpur lime
Lime Heen Naran
Pummelo Heen Naran, airlayers
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Additional Fruit Crops of Interest
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Avocado
• Sharwil (B): winter – spring (green), 8-20 oz
• Greengold (A): winter – spring (green), 8-20 oz
• Kahaluu (B): fall – winter (green) 12-20 oz
• Malama (B): fall-winter (purple), 14-24 oz(A) Day 1 am female, Day 2 pm male
(B) Day 1 pm female, Day 2 am male
Propagation: Grafting; Plant grafted trees!
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Kahaluu
Malama
Greengold
Sharwil
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Cleft graft
Grafted avocado: multiple cultivars toextend harvesting season.
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Canopy ManagementDevelop strong frameworkManage tree size to facilitate easy harvesting
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Pitaya Phenology
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowering (Jul mid Aug)
Harvest (end Aug end Oct)
Pitaya (Pitahaya, Dragon Fruit) Crop Cycle in Hawaii
Fruit Development
(end July mid Oct)
Pitaya: long-day-plant
http://www.ctahr.hawaii.edu/oc/freepubs/pdf/F_N-9.pdf
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Pitaya Fruit Growth
0.00
20.00
40.00
60.00
80.00
100.00
120.00
Week 2 Week 3 Week 4 Week 5 Week 6 Week 7
Weeks after Anthesis
Gro
wth Length (mm)
Width (mm)
16-30 fruits/treeAvg. wt. 550 g
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Production Constraints
Disease Strong Seasonality
Information on the performance of various clones under HI growing conditions.Plant self-fertile clones.
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PHYSICAL GRAFFITYSIN ESPINAS
Nic FL Mex
Nic FL
CEBRA SEOUL KITCHEN VALDIVIA ROJA
Self-Fertile Clones
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Mango in Hawaii
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Consistent Flowering
Insect and Disease Management
Canopy Management
Constraints to Mango Production
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http://www.ctahr.hawaii.edu/oc/freepubs/pdf/PD-48.pdf
Mango anthracnose (Colletotrichum gloeosporiodes)
http://www.ctahr.hawaii.edu/oc/freepubs/pdf/PD-46.pdf
Mango Powdery Mildew
Publications and Photos by Scot C. Nelson, CTAHR Plant Pathologist
http://www.extento.hawaii.edu/fruitfly
Insect & Disease Management
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Flowering
1. Shoot Initiation
2. Induction
Vegetative Flushing
pruning, nitrate sprays, cool temp
Cool temp<59 F Warm temp
(florigenic promoter) (vegetative promoter)
Branch Age
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Mango Cultivars Responding to Potassium Nitrate (4%)
• Haden• Momi K• Ruby• Joe Welch
• Keitt• Excel• Pope• Manzanillo
Haden
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Canopy ManagementRockhampton, Australia South Florida Taiwan
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“Condo” MangosCogshallFairchildNeelumLancetillaMallikaRosigoldAngie
Rosigold
Neelum
Mallika
CogshallAngie
Fairchild
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Mangosteen In Hawaii“Queen of Fruits”
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East Hawaii (2008-2010)Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Harvest period #2(early Jan mid Mar)
Flowering period #1 (early Apr late June) Flowering period #2
(mid Aug mid Sep)
Flushing period #1(mid June mid Aug)
Harvest period #1(early August early
Sep)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mangosteen Crop cycle
Flushing period #2(mid Nov late Dec)
Flushing period #1(mid June mid Aug)
Flushing period #2(mid Nov late Dec)
Flushing period #1(mid June mid Aug)
Flushing period #2(mid Nov late Dec)
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Production ConstraintsLong juvenile period
Inconsistent flowering
Insect pest damage(mangosteen
caterpillar)
Canopy area has a greater contribution to first flowering (precocity) than age.First bearing = 50.3 m2 (541.4 ft2 ) canopy surface area
Canopy--- Height = 14.5 – 15 ftDiameter = 8.5 – 9 ft
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flushing (Mar May)
Bud development (beg Feb April)
Flowering (end Mar April)
Durian Crop Cycle in Hawaii
Flushing(Aug Sep)Fushing
(Jan)
Bud Development #2(June Aug)
Flowering #2(June Sep)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
“King of Fruits”
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Fruit MaturationD 24: ~ 20 weeks Mon Thong: ~ 26 weeks
Ave. wt.: 4.9 lbs Ave. wt.: 14.7 lbs.
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Production Constraints
• Inconsistent flowering
• Inconsistent fruit set; pollination problems.
• Varieties best for HI
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Papaya
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Hermaphroditic flowers
Female flowers
Propagation from Seeds
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Fruits from female flowers
Male tree
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Papaya ringspotvirus disease
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(GMO) (GMO)
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Other Tropical Fruits
• Coffee• AnnonasBanana• Spice Crops• Cacao
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End