CSK HPKV

1. KNOL KHOL
PRESENTED BY :-HARMANJEET SINGH
A-2015-30-075
(VEGETABLES SCIENCE)
CSKHPKV PALAMPUR
(Brassica oleraceae var. gongylodes)

2. CONTENT
• Introduction
• Health Benefits Of Knol-khol
• Morphology
• Climatic Requirement
• Soil
• Varieties
• Seed Rate And Time Of Sowing
• Transplanting
• Manuring And Fertilization
• After Care
• Irrigation
• Pest & Diseases
• Harvesting

3. INTRODUCTION
 Family:- Brassicaceae
 Origin:- Western coastal Europe
 It is believed to be originated in the Western coastal Europe.
 Also known as Kohlrabi, Kohlrabi greens, Navalkol, Gunth Gobhi,
 The Whole plant is edible however, it is mostly used for its bulged
swollen stem

4. INTRODUCTION CONTI…..
 Knol-khol is originated from wild cabbage (B. oleracea var.
sylvestris)
 Purple/Early varieties are more susceptible to premature bolting.
 In India, knol-khol is more popular in kashmir and minor crop in
West Bengal, Himachal pradesh, Karnataka.
 In Kashmir, knol-khol leaves are also used as greens.
 It is excellent vegetable if used at its early stage before it becomes
tough and fibrous.

5. HEALTH BENEFITS OF KNOL-KHOL
• It is a rich source of minerals like Ca, Mg, P, K, Na, and S.
• Rich in the antioxidant , so helps fight cancer
• Contains high amounts of vitamins C, E and carotene
• Considered good sources of dietary fiber
• Contains sulphoraphanes and other isothiocyanates, which are
believed to stimulate the production of protective enzymes in the
body
• Have antidiabetic activity

6. MORPHOLOGY
• Formation of knob (tuber) which arises from a thickening of the
stem tissue above the cotyledons
• The fleshy edible proration is an enlargement of the stem, which
develops entirely above ground and is used as a vegetable
• The edible portion is globular to a slightly flattened stem

7. CLIMATIC REQUIREMENT
 Cool season crop
Temperature
 It can withstand extreme cold and frost better than
other cool season crop
 Optimum temperature 15 0C to 200C
 Tuber production 100C to 200C
 When grown below 15 0C for extended period early
varieties produce flower stalks (bolting) directly
without forming knobs
 Purple varieties more prone to bolting.

8.  Successfully grown on all types of soil
 But the sandy loam and clay loam soils are best
suitable
 pH 5.5-6.8
 A soil rich in manures and fertilizers produces
excellent knobs
 Does not grow well in highly acidic soil
SOIL

9. VARIETIES
• Palam Tender Knob
• White Vienna
• Purple Vienna
• King of North
• Large Green

10. PALAM TENDER KNOB :
• This variety has small round knobs
• Yield 250–275q/ha

11. WHITE VIENNA :
• This is an early variety with globular, light green, smooth, tender,
medium-sized knobs having creamy-white tender flesh with
delicate flavor
• Plants are dwarf, leaves and stems are medium green
• Yield potential of 150–200q/ha
• It matures 55–65 days after transplanting
• Takes 50–60 days for knob formation

12. PURPLE VIENNA
• Medium size
• one week later than White Vienna
• Knobs are purplish-blue with greenish-white flesh
• It has purple leaves
• It requires 55–65 days for knob formation with slightly better
yield potential than White Vienna

13. KING OF NORTH
• Plant height of 20–30cm foliage is dark green, knob flattish-
round, leaf sheath large and well-spread over the knob
• It matures 60–65 days after transplanting
• Early varieties mature 30–45 days after planting & characterized
by the horizontal position of the lower leaves
• The late varieties mature 70–100 days after planting

14. •SEED RATE :- 1 to 1.5 kg/ha
•TIME OF SOWING:-
- North Indian plains : September - November.
- Hills : March to August
Variety Time of sowing seed
in Nursery
Time of
transplanting in the
main field
Early August September
Main September October
Late October November

15. TRANSPLANTING
• 3 to 4 week old seedlings become ready for transplanting
• Ridges and furrow type beds used
• SPACING : 25cm × 25cm, 25cm × 30cm, 25cm × 40cm, 30cm ×
20cm or 30cm × 45cm depending on climatic condition
• Seedlings should be watered and protection may
be given from sun rays for 4 – 5 days

16. MANURING AND FERTILIZATION
• Knol-khol responds well to manuring, as it is a heavy feeder.
• Add N -- 100 kg/ha ,
P -- 80 to 90 kg/ ha ,
K – 150 to 175 kg/ha.
• Nitrogen is applied in 2 equal split doses, 3 weeks after transplanting
and at knob development stage .

17. AFTER CARE
• Weeds are removed from field by hand weeding.
• Generally 2-3 weeding are done in the initial stage of growth.
• The field must be kept free from weeds.
• Plant should be earthen up after 25 – 30 days of transplantation.

18. IRRIGATION
• Knol-khol requires a continuous supply of moisture for uniform
growth and development of knobs
• After transplanting, should be watered for 4 to 5 days (as stated
the seedlings, after transplanting, should be watered for four to
five days)
• Should be given an interval of 6 to 7 days
• Thereafter irrigation is done when needed, depending on soil and
weather conditions

19. PEST & DISEASES
PESTS
• Aphids
• Thrips
• Mustard saw fly
• Semi looper
• Nematods
• Caterpillars & beetles

20. DISEASES
• Damping off
• Leaf spot & blight
• Club root
• Black rot
• Root fly

21. PEST & DISEASES CONTROL
• Pruning of the old leaves
• Weed control & clean of field
• Use chemical & organic pesticides (foliar spray of garlic extract at
3% concentration, Spray Trichoderma at 2-3 % against root fly &
black rot)

22. HARVESTING
• Done at tender stage when the knobs attain 6-8 cm diameter
• Knobs are harvested by cutting the stem just below it by a sharp
knife or sickle before they are fully grown
• Should be harvested with few leaves for nearby markets and
without leaves for distant markets.
• Delayed in harvesting results in fibrous knobs development.