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2. UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK, BANGALORE
DEPARTMENT OF SEED SCIENCE AND TECHNOLOGY
TOPIC: SEED PRODUCTION OF TOMATO
SUBMITTED BY:
GOURAMMA HONGAL
PAMB1332
3. Content
1. Introduction
2. Botanical description
3. Importance
4. Floral biology
5. Climate and soil
6. Propagation
7. Nutrition
8. Interculture and weed management
9. Pest and diseases and their management
10. Rouging
11. Harvesting
12. Seed Extraction Methods
13. Techniques producing F-1 hybrid
14. Field and Seed standards
4. TOMATO
Tomato is one of the most popular vegetables of great commercial value.
In India, tomato was introduced by the Portuguese travellers.
Tomato is grown throughout the year in almost all home gardens and on
large scale in market and truck gardening systems.
It is native of Peruvian or Mexican region.
It is an excellent source of vitamin C and good source of vitamins A and
B.
Tomato seeds contain oil(about 24%) which is used as salad oil and in the
preparation of margarine
5. Botanical description:
Scientific name : Solanum lycopersicum
Family : Solanaceae
Chromosome no. : 2n=24
Origin : Peruvian or Mexican region
Plant type : Annual
Other names : Wolf peach, Wolf fruit
6. Importance
1.It is commonly cooked as vegetable along with other vegetables
like Potatoes
2.Various products are made from tomatoes are soup, ketchup,
sauce, chutney, powder, paste, juice
3.Tomato juice is used as an appetizer and beverage.
4.Tomato contains important minerals namely potassium, calcium,
sodium, magnesium, phosphorous, boron etc.,
5.Tomato has medicinal importance. Tomato juice promotes
gastric secretion, acts as blood purifier, and works as intestinal
antiseptic.
7. Plant Characteristics:
Habitat : terrestrial, wetland .
Leaf type : Leaves are compound (made up of two
or more discrete leaflets)
Leaf arrangement : Alternate, spirally arranged
pinnatified, oval, irregularly lobed.
Inflorescence: Cymes
Flower: Pendent, perfect and hypogynous, pale
yellow to yellow in colour. Stamens are 5 in number.
Ovary 6 celled.
Fruit type : Flesh berry with 2-9 loculi, orange,
yellow or red when ripe. Usually round pear shaped,
smooth or furrowed.
8. Important species of tomato
1. Lycopersicon esculentum
2. Lycopersicon cheesmani
3. Lycopersicon hirsutum
4. Lycopersicon peruvianum
5. Lycopersicon pimpinellifolium
9. Indian Agricultural Research Institute, New Delhi
Pusa Early Dwarf
Pusa red plum
Pusa ruby
Set 120
Sioux
IIHR, Bangalore
Arka Saurabh
Arka Vikas
Arka Vardhan
Arka Alok
Arka Vishal
11. Floral biology :
Inflorescence : Cymes- Flowers borne in cluster
Anthesis : It starts at 6 a.m. with maximum flower opening between
7 to 8 a.m..
Dehiscence : Peak from 9 to 11 a.m.
Stigma receptivity: Becomes receptive 16 hours before anthesis and
remain the same for 2-3 days after anthesis.
The optimum temperature for pollination is about 21ºC .
The pollen remain viable for 7-10 days at 20º C and 70% humidity.
12. Corolla :
Bright yellow
5 petals
Gamosepalous
Androecium :
5 stamens
Epipetalous
Small filaments
Large anthers
Gynoecium :
Ovary is superior, bicarpellary and syncarpous
Style- Single
Stigma- bilobed
14. Tomato is a warm season plant. It cannot withstand severe
frosts.
For plant growth, atmospheric temperature should be in the
range of 20ºC to 28ºC.
Night and day temperature below 15ºC and above 39ºC
respectively cause poor germination and develop off shaped
fruits.
A warm sunny weather is most suited for its ripening, colour,
quality and high yields.
Climate and soil
15. Soil which is well drained fairly light, fertile, organic matter rich
with a fair soil water holding capacity is ideal.
For early crop, a sandy loam soil is the best. Tomato do well in
soil reaction from pH 6 to 7.
It is moderately tolerant to acid soils (5.5).
Application of lime is advisable to improve soil Ph when it is
below 5
Soil
16. Tomato crop is propagated by seeds.
Raising of seedlings: The field for raising nursery should
be highly porous and fertile.
Raised beds are prepared and the seeds are sown in lines
of 5 cm apart.
The seeds are covered with sand. Watering should be
done with rose can.
Nursery beds may be covered with dry Saccharum grass
for 3-5 days to induce early germination of seeds because
of darkness.
The seedlings will be ready for transplanting 25-30 days
after sowing.
Propagation
17. About 500-800 gram of seed is enough to raise sufficient seedlings
for the planting of one hectare area.
One gram contains about 300 seeds.
It is advantageous to treat seeds with IAA in talc powder and to sow the
seeds after one months of treatment for better plant growth and higher
fruits yields.
Seed rate
Seed treatment
18. Tomato is a heavy feeder of macronutrients (N,P,K) and therefore
these should be applied in right doses in right time and with
suitable method so that better growth and development is
attained.
For Karnataka Irrigated: 250:250:250 kg NPK per hectare
For Karnataka Rainfall: 60:50:30 kg NPK per hectare
Along with NPK, FYM of 35 tons/ha is applied.
Micronutrients such as Ca, Boron, Zinc are important. These are
applied through foliar sprays.
Nutrition
19. Organic manures are incorporated in the soil before or at final
ploughing.
Application of Nitrogen is done in two splits doses during winter
and in three splits during rainy season.
The first application is done 3 weeks after transplanting of seedlings
and 2nd application just at the beginning of flowering and 3rd
application is done during fruiting stage.
Whole quantity of Phosphorus and Potassium is applied on both
sides of row and mixed with soil.
Method and time of application
20. Tomato seedlings become ready for transplanting when they
attain 10-15cm height and are of 3-4 weeks old.
Seedlings should be uprooted carefully from the nursery bed.
Transplanting is done either in flat bed(in light soils) or on
ridges(in heavy soils) at 60×30 cm.
Planting on ridges provides good support to plants and less attack
of fruit diseases.
Planting may be done preferably in the evening.
Light irrigation is done immediately after planting.
Transplanting
21. 1st irrigation is given just after transplanting of seedlings .
2nd irrigation should be given on the 3rd day of planting and the
subsequent irrigations at 7days interval depending on the soil
conditions and prevailing local climate.
During hot season, the tomato is irrigated once in a week.
During winter season. Whenever there is a danger of frost, the
crop must be irrigated as it helps to maintain temperature above
freezing.
It is an essential for keeping down weeds and maintenance of soil
mulch. The 1st hand hoeing and weeding should be attended to on
25th day of planting and earthing up on 45th day.
To control weed 2l basin mixed with 600-700 l of water should be
sprayed and mixed with soil before transplanting
Irrigation
Interculture and weed control
22. Major Insects - pests in tomato
1.Fruit borer
2.Jassids
3.Tobacco caterpillar
4.White fly
5.Root knot nematodes
Control:
1.Hand picking of insects and pests.
2.Follow crop rotation.
3.Spray with suitable insecticides.
4.Grow resistant varieties
23. Major diseases of Tomato
1.Damping off
2.Buckeye rot
3.Fusarium wilt
4.Early Blight
5.Late blight
6.Bacterial canker
7.Leaf curl virus
26. Individual plant is given support with the help of wooden stick or
bamboo stakes.
Support prevents plants from bending, fruits do not come in direct
contact of soil, insects find comparatively less hiding place, spraying
of insecticides becomes easy.
At least 3 times roughing should be carried out at different stages of
crop growth.
1. Pre flowering stage: The 1st roughing is done for the plants which
bears flowers, plants different in their branch and leaves orientation,
leaf colour, plants different in general plant type including
determinate and indeterminate habit, should be removed if they are
different than the grown variety.
Training and Pruning
Roguing
27. 2. Flowering stage: The 2nd roguing should be done at flowering
and post flowering stage. The plants which do not bear flowers
and plants show different flower colour than the grown variety
should be removed from the field.
3. Fruit stage: In this roguing, the plants which show different
fruit size and shape should be removed. The plants which show
unripe fruit colour or ripe fruit colour other than variety grown in
the field should also be removed from the field.
Tomato fruits are harvested for seed purpose at pink to red ripe
stage.
Hybrid seed yield is about 40-50 kg/ha .
Harvesting and seed yield :
28. 1. Fermentation method: The ripe fruits are crushed wall in a
non-metallic container by hand. The entire material is kept as such
till it ferment. When fermentation is completed it shows profuse
foam formation on the upper surface of material and tomato flesh
separated from seeds completely. Seeds are washed at least 8-10
times with clean water. Seeds are spread thinly in the sun for
drying.
2. Alkali treatment method: The extracted material with pulp is
treated with an alkali mixture in equal volume. When the alkali
mixture is cooled, allow it all to stand overnight in an earthen pot.
Next day, all the seeds will settle down at the bottom of the
container. The liquid is decanted off. Seeds are washed thoroughly
with clean water and allowed to dry in the sun.
Seed extraction
29. 3. Acid treatment method: In the extracted tomato pulp
commercial hydrochloric acid at 5-6 ml/kg pulp is thoroughly
mixed and stirred and washed thoroughly after 30 min with clean
water, and seeds are allowed to dry in the sun.
Washing:
After the extraction the seed are washed with water to remove the
pulp.
The water is added to containers with the pulp and seed.
It is stirred thoroughly and is drained out along with pulp and
other mucilaginous substance.
This process is repeated until the seeds are clean.
30. After washing the seeds should be dried as rapidly as
possible.
Seeds may be spread on screen bottom trays, or cloth and
placed in the open where a maximum exposure to sun and
dry air is available.
The seeds should be dried to 8 per cent moisture before
storage.
Grading: The seeds are passed through different size of
screen preferably above 0.6mm to 0.8mm size.
Drying
31. Whole dry lot of seeds are graded.
The seeds are passed through different size of screen preferably
above 0.6 mm to 0.8 mm size.
However, size of screen or sieve also varies with varieties.
Larger seeds are superior to smaller seeds, hence, grading of
seeds is absolutely essential to get maximum seed quality.
Grading
32. Packing and Storage:
The seeds should be treated with captan or thiram 75WDP at
2g/kg seed.
After treating the seeds should be packed in polythene bags then
the seeds should be stored with 8-10 per cent moisture in
container of moisture- vapour proof.
Such seeds will remain viable up to 70-80 per cent at the end of
about 25-30 months of storage.
33. Technique of producing F1 hybrid Tomato seed
Hybridization requires the growing of 2 separate male and female parents. The male
parent provides pollen and the female parent receives pollen resulting in the fruit
bearing, the F1 hybrid seed
Ratio of male to female is 1:5.
All the flowers of female parents are emasculated during their late bud stage. It is done
by removing their anthers with the help of suitable forceps carefully, prior to applying
pollen to its stigma.
Pollen is collected from the flowers by detaching from the male parent and is applied
with a fine brush to each emasculated female flower.
Pollination should be followed by bagging of flowers avoiding any chances of cross
pollination through bees.
Pollinated flowers are marked with tag for ease in identification of fruits containing
hybrid seed at harvest time.
34.
35.
36. Dusting of pollen grain on emasculated flower
Bagging of pollinated flower to avoid
contamination with foreign pollen
37. Field standards for Tomato Seed production
Factors Foundation seeds Certified seeds
Isolation distance 50m 25m
Off types (maximum) 0.1 0.2
Other crop plants (maximum) None None
Objectionable weed seeds(max.) None None
Diseased plants 0.1 0.5
38. Seed Standards for Tomato seed production
Standards Foundation
seeds
Certified seeds
Pure seed (minimum) 98% 98%
Inert matter (maximum) 2% 2%
Other crop seeds (maximum) 5/kg 10/kg
Weed seeds (maximum) None None
Germination (minimum) 70% 70%
Moisture (maximum) 8% 8%
For vapour proof container 6% 6%