Greenhouse Tomatoes and Growing Vegetable … Tomatoes and Growing Vegetable Transplants Tomato...
Transcript of Greenhouse Tomatoes and Growing Vegetable … Tomatoes and Growing Vegetable Transplants Tomato...
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Greenhouse Tomatoes and Growing Vegetable Transplants
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Tomato
Native to “tropical” America, most likely Andes Mountains of Bolivia and Peru
Mexico country of domestication?
Member of Night Shade Family (Solanaceae) along with
Peppers, Eggplant and Potato
Botanically a Fruit (develops from an ovary), commercially recognized a Vegetable
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Nutritional Content
British thought it poisonous “fruit of evil spirits”, French “love apple”
From Mexico to Mediterranean
1835 before cultivated here
16th among vegetables for vitamins
Vitamin A, Vitamin C, and Potasium
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Lycopene
“world’s most powerful antioxidant”
Help prevent many types of Cancer
Contained in the red pigment of the fruit
5 times amount in cooked tomatoes
Tomatoes = best source Watermelon & Grapefruit
Not synthesized in fruit air temp Less than 50 F or above 85 F
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Salicylates
Found in tomatoes
Aspirin-like substance
Reduce risk of heart disease
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• Uneven Stand Establishment
• Short Growing Season
• Poor Soils
• Weed Control
• Early Season Marketing
Why Transplant?
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Uniform Plant Stand
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Short Growing Season
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Poor Soils---wet, late,
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Jump on the Weeds
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Early Marketing
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Purchase vs. Growing
Save Labor—someone else
Greenhouse time—more vacation
Fuel Costs—later season
Aggravation??? It can be difficult
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Grow Your Own
Less Costly Greater Flexibility: Variety Selection Timing Quality Control Disease & Insect Issues
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How to Grow Sturdy Transplants
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Balancing Act
Water
Light
Temperature
Fertility
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Leggy Plant
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Causes of Leggy Plants & Remedy
Shade
Pro long cloudy weather
Excessive Watering
Too High Temperature
Excessive Fertilizer
Too Crowded Roots or Plants
Full Sunlight
Lower Day Temperatures
As Necessary
Skillful Management
Less Frequently
Bigger Pot/More Room
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Transplanting Difficulty
Easy Some Trouble Special Care
Beet Celery Sweet corn
Broccoli Eggplant Cucumber
Brussels Sprouts Onion Muskmelon
Cabbage Pepper Summer Squash
Cauliflower Watermelon
Chard
Lettuce
Tomato
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General Cultural Practices of Tomatoes
Crop Scheduling
Cultivar Selection
Plant Propagation
Plant Spacing
Pruning and Training
Pollination and Cluster Pruning
Harvesting and Storage
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Crop Scheduling
Successive Plantings vs. Starting all at same time. 1st 2 houses month apart Next 6 houses 7-14 days apart Why? Better Quality vs. More Efficient First 3 trusses large, gorgeous fruit Less disease issues Less worries about fine tuning
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PLANTINGS
10 Plantings: 30,000 lbs.
March 17- June 15
Ground heat to Inflation Busters –all with heat
Focus on first 4-5 trusses—best quality, less disease worries, less fine tuning
30 years—move along
2-3 inches semi-composted cow/horse manure
Soil test 4-5 years saturated media extract
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Trusses later in the Season
Whole host of problems:
Leaf mold,
Botrytis
Abscission
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Cultivar Selection
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Variety Selection: Select For:
FLAVOR
Type of Tomato—Beefsteak, Cluster, Cherry
Disease Resistance
Days to Harvest
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VARIETIES Geronimo – vigorous, disease resistant, great producer, late, ok flavor
Big Beef/Goliath – early, excellent flavor & size, prone to tomato fulvia & green shoulder, 4 truss production, semi-deT. respond well to one sucker
Tomimaru Muchoo – pink, incredible flavor, less acidic, 6-8oz.
Big Dena – playing with this variety
NO-Jetstar, BHNs, Rebelski, Trust, Mt.Merit, Charger, Clermon,
Small: Sakura, Sunpeach, Black Cherry, the Tigers, Bumble Bees, Sungold
Yes-Maxifort—uneven germinator but works, try DRO 141TX
Heirloom- usual suspects; try F1 versions
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Plant Propagation
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Media for Transplants
Should be lightweight
Should have good drainage characteristics, but not dry out too fast
Should be well aerated
Should have low soluble salts
Should be free of pests (weeds, diseases, insects, and pests)
Mostly artificial mixes are used (peat based, although coir based mixes are growing in popularity)
Compost-based mixes
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Seeding
Celery 1/8”
Most other seeds ¼ to ½ “
Larger seeds around 1 “ Sweet corn, beans, most
cucurbits
In most situations seed sized determines the depth of planting.
http://www.landrethseeds.com/catalog/popup_image.php?pID=4853
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Temperature
Optimum germination for most seeds is 75-85 F, but 90 F for many of the cucurbits
http://www.landrethseeds.com/catalog/popup_image.php?pID=4853
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Light, Light, Light
16 hours per day when seedlings
3--Hi Sodium Vapor lights
Plants flower 1-2 weeks earlier
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Transplants Grow Quickly Under Optimum Conditions—mid 70s by
day & low 60s at night
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Watering Transplants
Very Tricky and Hard to learn
use hose with soft head
Sunny and warm-early morning soak
Sunny and Hot-early, mid, maybe late
Cloudy and cool-spot watering or none
No ebb & flow, trough systems or capillary mat.
No Drip Tubes or overhead systems
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Water & Fertility low dose 15-16-17 -150 ppm.
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2 week transplant—606, 806
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Types of Containers
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General Cultural Practices of Tomatoes
Crop Scheduling
Cultivar Selection
Plant Propagation
Plant Spacing
Pruning and Training
Pollination and Cluster Pruning
Harvesting and Storage
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2 week-old seedling
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Grafted Plant
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Ready for Transplanting 4 “ pots
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4 week un-grafted transplant—4” pot
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30 Years in Big Tom
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Nutritional Requirements Soil Preparations
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Ground Heat 60-70 F.
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Drip Irrigation
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6-8 week old-Let’s Plant.
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PLANT DENSITY
8 – 24 inches apart
512 –134 plants
4-10 square ft./plant
Yields: 9-38 lbs./plant
Deciding Factors:
what are you trying to accomplish?
• Early Yield vs. Overall Yield
• Foliar Disease
• Single String or Sucker
• Plants grafted?
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Early Yields
High Density 4 rows x 8 inches = 504 pl. = 4 sq. ft./pl.
Non-grafted Geronimos = 3 lb. per truss = 1,512 lb. x $4.00 per lb. = $6,048
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Single Row “V” 12-24 inches apart, first sucker left
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Environmental Requirements
Temperature
Light
Relative Humidity
Carbon Dioxide
Air Movement
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Temperature
Bright Days:
Day = 72-75 F
Night = 64 F
Dark Days:
Day = 66-68 F
Night =60-62 F
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Light Why is it so !
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Light
Plant Matter is produced by the process of Photosynthesis
Light is absorbed by the Chlorophyll (green pigment) in the green parts of the plant mostly leaves
Atmospheric CO2 + H2O = Carbohydrates as sugars & starches.
• Greatly reduced without Light
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Carbon Dioxide
Enrichment does increase yields
Most Important in Winter Crops
More difficult in Spring/Summer Crops where constantly venting
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Straw
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String or Weave??
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String
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Clip
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Tie
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Pruning and Training
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Truss Hooks
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Flower Pollination Vibrator or Bees
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Abscission: When Fruit Fails to Set
Causes:
• Adverse Temperature
day=below 60F, above 90F
night= below 55, above 75F
• Excessive Growth
• Poor Light
• Incorrect Nutrition
• Crop stress
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Cluster Pruning
To Prevent Exhaustion of Plants
Improve Fruit Size in early & later clusters
Remove any misshapen or damaged fruit
Prune first two clusters = 3 fruit
Later clusters = 4 fruit
Too much lead to Blossom End Rot
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Harvesting
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Store at 46-50 F; No, 60 F.
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Disease Issues
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Prevention
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Ways to Reduce Diseases
Cultivar Selection: resistant or tolerant
Reduce opportunity: Good Sanitation
Manipulation of Environment using different cultural practices
Fungicides
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Geronimo! Cultivar Selection
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Grafting
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Sanitation
Clean Seed: hot water treated
Transplant into sterile, clean containers
Roguing isolated infected plants
Maintenance of areas surrounding fields or Greenhouses---weeding, mowing
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Cultural Practices
Drier Foliage
Staking, pruning and wider rows
Horizontal Air Flow Fans
Ground Plastic
Roll up sides
Lower Relative Humidity60-75%
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Fungicides
Microbial Pesticides: Plant Shield = beneficial fungus Trichoderma Harzianum
Effective vs Pythium, Rhizoctonia, & Boytrytis
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Insect Problems
White Flies
Tomato Hornworms
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Vegetativeness vs. Reproductiveness
Too much N. = Vegetative, poor fruit set & low productivity
Too little N. = over-productivity leads to carbohydrate starvation, slow growth & low productivity
Read the plant: Properly Nourished Plant = Stem 1 cm thick at a point 15 cm below the growing point
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Read the Plants ½ inch thick 6 inches from growing point
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Balancing Vegetative Growth with Fruit Production
Stress is the Key!
Options:
N:K ratio
Water management
Leaf Removal
Rootstock Vigor
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Nutrient Requirements Stage of Plant Development
Prior to first flower: N:K = 1:1
1st cluster to 4th: N:K = 1:1.5
Mature fruit to ripening: N:K = 1:1.7
To boost vegetative growth increase N proportion
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Irrigation Balancing Act
Reproductive Growth
Increase Water Stress
Vegetative Growth
Irrigate more often
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Lots of Water!!!
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Irrigation: Rules of Thumb
8-10% dry down = Vegetative Growth 17% dry down = Reproductive Growth Adjust water stress throughout day Wetter earlier, drier later Adjust water frequency to weather conditions
and plant size Frequent light irrigations are best Avoid Chronic over or under watering Avoid Daily Extremes
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Blossom End Rot
Blossom end of fruit turns light brown then black as the cells decay.
Causes: In Combination
Calcium deficiency coupled with
Moisture Stress—Cloudy days no transpiration
Excessive fruit pruning (excessive hormones from the roots to developing fruit)
Low PH-calcium not available
High NH4 Ammonium availability
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Staking and Weaving
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Low Cost Tunnel Houses
Inexpensive to purchase, build and maintain. 96 ft. x 14 ft.
Recoup the capital cost the first year.
Grow Less Plants: 2ft. Spacing = 138 plants.
Weaving technique less labor than stringing.
Only ground suckering.
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Inexpensive
14 x 96 ft house, shoulder boards, base boards, gable ends of 2 x 4s, heater, fans, single poly cover, and black plastic ground cloth and labor = $3,250 +/-
Yields 2,000 lbs. @ $2.75 per lb. = $5,500
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Inexpensive
14 x 96 ft house, shoulder boards, base boards, gable ends of 2 x 4s, heater, fans, single poly cover, ground cover and labor = $6,000 +/-
Yields 2,000 lbs. @ $3.75 per lb. = $7,000
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Weaving Less Labor
A Stake every other plant.
Weave +/- 5 times
Sucker ground suckers 1 time.
That’s it Done-Harvest.
Less Blossom abortion from heat
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Fewer Plants
More Greenhouse Space for other plants
Fewer Plants to grow and care for.
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Field Tomatoes Good Luck!