producing small fruit berry crops in mild winter …cesanluisobispo.ucanr.edu/files/202936.pdfsmall...
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Producing Small Fruit Berry Crops in Mild Winter Climates
Mark Gaskell, Ph.D. University of California Cooperative Extension
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Small fruit "Berry" crops
• Blueberry
• Blackberry
• Raspberry
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Blueberry nutraceutical value
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57.2% 24.7%
11.1% 5.5%
1.4%
U.S. sales of small fruits - 2008
Strawberry Blueberry Raspberry Blackberry other
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Consumer demand for small fruits - US
source: FreshFacts- www.perishablesgroup.com
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Environmental factors affecting production
• Temperature • Moisture vs relative humidity • Wind • Soil environment • Frost threat
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Temperature
• Overall adaptation VS problems
• Frost, freeze threat
• Heat unit accumulation; timing
• Night VS day
• Soil temperature
• Fruit quality VS vegetative growth
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Environmental factors affecting production
• Temperature • Moisture VS relative humidity • Wind • Soil environment • Frost threat
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Moisture VS relative humidity
• Rainfall - soil moisture - salinity? - dust, mites, whitefly
• Relative humidity - disease incidence - fruit quality
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Environmental factors affecting production
• Temperature • Moisture vs relative humidity • Wind • Soil environment • Frost threat
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Wind
• Moisture loss - evapotranspiration (ET) - irrigation management
• Physical effects - cane breakage - fruit scarring - sand, soil abrasion - manage protected structures
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Environmental factors
• Temperature • Moisture VS relative humidity • Wind
• Soil environment
• Freeze threat
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Soil environments
• Physical properties
• Chemical properties
• Biological properties
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Environmental factors affecting production
• Temperature • Moisture vs relative humidity • Wind • Soil environment • Frost threat
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Frost protection
• Short-term losses - flower, fruit abortion - fruit damage - loss of market, production, price
• Plant little effected
• Protection - irrigation ~ 3-4o F.
- wind machines > air mixing ~2-3o F
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Climates dictate environmental conditions
• Macroclimate geographic positions > marine vs continental latitude altitude
• Microclimate plant canopy soil surface soil environment
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Macroclimates
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Macroclimates
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Macroclimates
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Macroclimates
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Small fruit berry crops
• Small perennial shrubs or vines
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Small fruit berry crops
• Share many production and marketing characteristics with strawberry.
• Small perennial shrubs or vines.
• Historically cultivated in temperate cold areas. > now also into subtropical areas of US,
- Florida, California also Spain, Portugal, Morocco and highland tropics in Mexico and Central America
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Small fruit berry crops
• Share many production and marketing characteristics with strawberry
• Small perennial shrubs or vines
• Historically cultivated in temperate cold areas. > now also into subtropical areas of US, - Florida, California
also Spain, Portugal, Morocco and highland tropics in Mexico and Central America
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Grown in open fields or "protected"
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Blueberry
• Historically high chill reqt., E. US, low pH soils
• Breeding effort began in 1970 to breed early, low-chill varieties for SE US
• California initiated serious R&D in late 1990s; now > 8,000 acres
• Chile and Argentina over-planted > California, Florida now compete for transition and early market; some beginning from MX
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Raspberry
• Historically, processing and machine harvest.
• Backyard and minor fresh crop until 1980s; CA production + exports from Chile, Central America.
• Driscoll's breeding since 1950's; \ creation of major industry in California beginning in 1990s.
• Now 2-3rd most important crop in Ventura and Watsonville and industry in excess $200 million.
• Based on intensive production in tunnels and shortened crop cycle.
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Blackberry
• Followed raspberry, processed, machine harvest.
• Backyard / minor fresh crop until 1980s; CA production + exports from Chile, Central America.
• Breeding programs in Arkansas and Oregon; USDA > major berry companies now have own programs.
• Sweeter, firmer fruit have led to growing demand and very rapidly developing new industry.
• Mexico is major world supplier; US industry is strong around MX arrivals.
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Production AND Fruit Quality
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• Temperature • Moisture VS. relative humidity • Wind • Soil environment
+ latitude, proximity to markets, labor, infrastructure?
Berry crop environments
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0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4Fr
uit Y
ield
(lb/
plan
t)
AbundanceAlapahaBiloxiBlue CrispCamelliaEmeraldJewelMistyOchlockoneePalmettoPowder BlueRebelSan JoaquinSapphireSnowchaserSpringhighStarVernon
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0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0Fr
uit Y
ield
(lb/
plan
t)
Abundance
Biloxi
Blue Crisp
Camellia
Emerald
Jewel
Misty
Palmetto
Rebel
San Joaquin
Sapphire
Snowchaser
Springhigh
Star
Southern highbush varieties for early season
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Rabbiteye varieties for late season
0
0.2
0.4
0.6
0.8
1
1.2
1.4Fr
uit Y
ield
(lb/
plan
t)
AlapahaOchlockoneePowder BlueVernon
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Pruning primocane blackberries – Los Alamos, CA 2013
0
500
1000
1500
2000
2500
Frui
t Yi
eld
(lb /
acr
e)
floricane (3 ft)
10-Jan
15-Feb
1-Apr
Mow down time
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Organic Berry Production
• Growing demand in North America, Europe, Asia > more specialized market with premium prices
• Higher costs of production and more demanding management > specialized skills and special research needs
• Very different soil environment – nutrient availability
• Very different pest management regimes - managing weeds, insect pests are more challenging
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Producing Small Fruit Berry Crops in Mild Winter Climates
Mark Gaskell, Ph.D. University of California Cooperative Extension