CAULIFLOWER
B.N.- Brassica oleracea .L. var. botrytis Family: Cruciferrae
Nutritive Value- The Cole crops are rich source of vitamin C and A.
Particular Cauliflower Cabbage Broccoli
Carbohydrates (g) 4.0 4.6 5.5
Protein (g) 2.6 1.8 3.3
Fat (g) 0.4 0.1 0.2
Vitamin A (IU) 51 2000 9000
Vitamin C (mg) 56 124 137
Calcium(mg) 33 39 1.29
Variety-
Early- Silver cup 60, White glass, Rami, Milkway, white flash, Sweta
Late- Kathmandu local, Dolpa snowball, Kiojaint, Sarlahi Deepali, Jyapu, N.S. 90, Snowdome, N.S. 84 etc.
Climatic requirement and soil- Indian varieties of cauliflower can tolerate to high temperature while snowball group is very sensitive to high temperature. Curd formation in cauliflower is sensitive to high as well as low temperature. Different varieties of cauliflower require very specific temperature for their curd formation and its quality. Indian varieties of cauliflower can tolerate the temperature as high as 40oC. The optimum temperature for most of the cole crops for seed germination and growth is 12-18oC except early cauliflower. High temperature in cauliflower caused riceyness, fuzziness, buttoning, yellowing and loosening of curds. The low temperature injury in cauliflower causes blindness.
Fertile, medium to heavy well drained loam soils are best suited to grow cole crops. Cole crops can be grown in slightly acidic to saline soils. However, the optimum pH range is 6.0-7.0 because there is incidence of club rot disease. Molybdenum deficiency occurs more frequently in acidic soil below pH 5.5 which causes whiptail disorder in cauliflower. Therefore, liming of soil should be done to raise the soil pH above 5.5. One deep ploughing and 2-3 light ploughing followed by planking is essential to obtain the fine tilth.
Nursery raising- The sandy loam and loam soils rich in organic matter are suitable for the nursery. In soil with good tilth 15 cm raised nursery beds of 3m length and 1 m width are prepared. About 20-30 beds are sufficient for on hectare area. 15 kg FYM and 50g of N:P:K (19:19:19) complex fertilizer, 200g powered neem cake along with 10g carbofuran per bed is incorporated. The beds are drenched with captan or any systemic fungicide @ 2-3 g/liter of water. Seeds are sown thinly in rows 6 cm apart and 1 cm deep. The beds are covered thinly with straw or grass layer and irrigate with rose-cane. On germination (8-10 days) the beds are again drenched. After the appearance of first true leaf seedlings are thinned out. On the 20th day Monocrotophos or any systemic insecticide (1.5-2 ml) and on 25th day mancozeb are sprayed. During the last week of nursery, the seedlings may be hardened by slightly withholding water for better establishment of seedlings. The seedlings with 5-6 true leaves are transplanted after 30 days.
Seed Rate- For Early crops 600 to 750g of seed are required and for late crops 375 to 400 g seed are required per hectare.
Sowing time- The seed is sown in raised nursery beds which should be sterilized by formaldehyde or some fungicidal treatment. The seed for early sowing should be treated with some mercurial fungicide to save the young seedlings for damping off. According to season early sowing is done from the middle of Jestha to the end of Asar. The late crop is sown from the middle of Bhadra to the end of Ashwin. According to altitude the Magh to Baisakh is suitable time for high hills while shrawan to falgun for mid hills and asar to shrawan in terai depending upon varieties.
Transplanting- The seedlings are transplanted when four to six weeks old, depending upon the season in a well prepared field. The planting distance depends upon the fertility of soil, season, variety and market demand. In some markets small to medium sized curds are preferred to large- sized ones. Closer spacing is given for supplying cauliflowers to such markets. Generally, a spacing of 45cm away is kept for the early varieties and 45 cm from plant to plant and 60 cm from roe to row for late varieties.
Manures and fertilizers-The cauliflower requires very heavy manuring as it removes large quantities of major nutrients from the soil. The fertilizer practices differ in different regions. For best results, 20 to 30 tons of farm yard manure or compost should be applied per hectare three to four weeks before transplanting. 200 kg of nitrogen, about 120 kg of phosphate and 200 kg of potash per hectare should be applied before transplanting. A placement of 5 to 7 cm deep on both sides of rows are advisable. A cauliflower crop often shows boron and molybdenum deficiency symptoms when grown either on an alkaline or highly acidic soil. In such cases 10 to 15 kg of borax per hectare may be applied to the soil or two sprays with 0.3 percent borax on the seedlings may correct the boron deficiency symptoms. Molybdenum deficiency symptoms occur in highly acidic soils and can be corrected by liming or application of about 1 to 1.5 kg per hectare of sodium molybdate.
Interculture and Irrigation- Frequent shallow cultivation should be given to the soil to kill weeds and provide soil mulch. Cauliflower being a shallow-rooted crop, most of its roots is within 45 to 60 cm of the top soil.
Deep cultivation should, therefore, be avoided. The plants should be earthed up about 4 to 5 weeks after transplanting. Water must be supplied to ensure continuous growth. An early crop after transplanting may need irrigation twice a week and late crop once a week.
Blanching-A perfect head of cauliflower pure white, it is necessary to execute sunlight to obtain this. White head is protected by the inner leaves but later the curds are exposed. The common practice is to bring the outer leaves up over the head and tie them with a twine or rubber band,it is easy at the time of harvest to select those tied earliest.
Harvesting, Grading, Packing and Storing-Cauliflower is harvested when the curds attain a proper size and before they begin to discolour. It is separated into three grades, depending upon the size colour, quality and variety. The usual method of packing and transport of cauliflower is in big nets and trucks. Tight packing is essential to prevent shifting and bruising. In some countries cauliflower is packed in crates and wire-bound boxes. Cellophane and transparent films are also used to pack cauliflowers which are hydro-cooled to remove field heat. Cauliflower with leaves attached can be stored for 30 days at 00C with 85 to 90 percent relative humidity.
Yield- The yield of cauliflower may vary from 15 to 20 tons per hectare. The early crops give low yields and the mid-season crops give high yields.
Physiological Disorders
Browning (Brown rot or red rot): This is caused by boron deficiency. The trouble first appears as water-soaked areas in the stems and on the surface of the curd. Later, these areas change into a rusty-brown colour. Browning is associated with hollow stems. Other symptoms are changes in colour of foliage, thickening, brittleness and downward curling of order leaves. Application of borax @ of 10 to 15 kg per hectare on acid soils controls browning, though the amount depends upon the character of soil, soil reaction and the extent of deficiency. On neutral and alkaline soils, a larger quantity should be used.
Whiptail: The results from the deficiency of molybdenum becomes unavailable in very acid soils. Liming may correct the deficiency symptoms in such cases. There is varietal sensitiveness to molybdenum. The leaf-blades do not develop properly. In the severe cases only the midrib develops, and whiptail can be prevented by bringing the soil pH to 6.5 by liming or by applying 1 kg of sodium or ammonium molybdate per hectare.
Buttoning: The term buttoning is applied to the development of small heads or buttons. The plants do not develop normally and the leaves remain small and do not cover the developing heads. Deficiency of nitrogen is the main cause of buttoning. Planting early varieties as late season may also cause buttoning. Apply recommended dose of N.
Blindness: Blind cauliflower plants are those without terminal buds. The leaves which develop, large, thick, leathery and dark green. Blindness is supposed to be due to low temperature when the plants are small or due to damage to the terminal bud during handling of the plant or injury by insects pests. Protect crop from the low temperature and control the insect-pest.
Riceyness- Pedicles bearing the individual flower elongated. The curd become granual and loose. Warm weather and poor quality seed is responsible for this disorder. To mange this disorder, sow the seed when temperature is favourable.
Fuzziness- Peduncle elongated to give a rise a full velvety appearance of curds formed. This is mainly caused due to unfavourable climatic condition. To control this disorder avoid sowing when temperature is high.
Hallow stem-This disorder affects all cole crops. Hollowness caused by boron deficiency is characterized by the appearance of water soaked areas and discolouration of tissues. When it is caused due to excess of N, The affected stem remain clear white with no sign of disintegration. To control this, spray borax @ 0.3-0.4%, reduce the dose of N and transplant the crop at closer spacing.
Diseases-
Soft rot: It occurs in the field usually after an attack of black rot, or after mechanical injury of nearly mature curds. The casual organism os another bacterium known as Erwinia carotovora.
Clubroot: The roots show large swellings presenting a clubbed appearance. It is caused by a fungus Plasmodiophora brassicae. The foliage wilts on sunny days and recovers towards the evening. The disease is prevalent in acid soils. Avoiding cole crops in affected plots, long rotations without any cruciferous crops and keeping the soil alkaline are the control measures.
Black leg (Phoma lingam): It affects all the parts of the plant. Infection often occurs on the stem of the young plants in the seed- bed or in the field, causing dark sunken areas. The wilting of the plants is characteristic of the advanced stages of this disease. Hot water treatment @ 50 oC for 25-30 minutes, is affective in destroying the fungus in the seed.
Downy Mildew: It is common in young plants and is characterized by the appearance of purplish- brown spots on the underside of the leaves. Downy growth usually appears on the under surface of the lesions. The upper surface of the leaf on the lesion is tan to yellow. The casual organism is Peronospora parasitica, an obligate parasite. The primary inoculums being present in the soil, sanitation, and crop rotation help in reducing the infection. The disease also affects cabbage.
Insect pests
Cabbage maggot: The maggots first attack the young rootlets and then burrow into the main root, causing the plant to wilt. Dusting or application as a water suspension of Calomel or application of Dieldrin also controls the insects.
Green cabbage worm and cabbage looper : These feed on the foliage of cauliflower and can be controlled by spraying DDT or malathion 2 to 3 weeks prior to harvest and application of Pyrethrum when the curds have formed.
Cabbage and Turnip Aphids: These insects are more injurious during the latter part for the growth or when the crop is left for seed production. The attack is controlled by spray of malathion or parathion but if the curd is ready for harvest, nicotine sulphate is usedwww.narc.gov.np
I would like to be better in my field as agriculture for developing myself and then I should help the farmer or poor people ,so if you have any ideas about making better in farming then please share us...
Thursday, 20 February 2020
New techniques of egg plant production
Brinjal or eggplant (Solanum melongena L.) is one of the most popular and principal vegetable crops. It is a perennial plant but grown as an annual. Brinjal has three main botanical varieties under the species melongena; the round or egg shaped cultivars grouped under var. esculentum; the long slender types are under vari. surpentinum; and the dwarf brinjal plants put under depressum. The flowers of brinjal are hermaphrodite and of 4 types depending upon the length of style.
Long-styled with big sized overy.
Medium-styled with medium sized ovary
Pseudo-short styled with rudimentary overy and
True-short styled with very rudimentary ovary.
Fruit set does not take place in pseudo-short and true-short styled flowers. Brinjal is originated from a wild species Solanum sysimbrifolium. Brinjal has Ayurvedic properties. The fruits of brinjal are excellent remedies for those suffering from lever troubles. White brinjal is good for diabetic patient. The green leaves of brinjal are excellent source of vitamin C. The bitter taste of brinjal is due to glycoalkaloids.
Varieties- Nurki, Arka Nidhi, Arka kesav, Sarlahi green, Purple long, Lukee, Benighat Seto
Climate- The brinjal is warm season crop, therefore, susceptible to severe frost. Low temperature during the cool season crop causes deformation of fruits. A daily mean temperature of 13-21oC is most favourable for optimum growth. The brinjal seed germinate well at 25oC.
Soil and field preparation- Light soils are good for an early yield, while clay loam and silt loam are well suited for higher yield. Loam and sandy loam soils of normal and high fertility status are best suited for brinjal cultivation.
The soil should be thoroughly prepared by ploughing 4-5 times before transplanting the seedlings. Bulky organic manures like well rotten cowdung or compost should be incorporated evenly in the soil.
Nursery raising- The sandy loam and loam soils rich in organic matter are suitable for the nursery. In soil with good tilth 10-12 beds of 15 cm raised nursery beds of 3m length and 1 m width are prepared. 15 kg FYM and 300g of N:P:K (15:15:15) complex fertilizer along with 7.5g carbofuran per bed is incorporated. The beds are drenched with captan or any systemic fungicide @ 2-3 g/liter of water. Seeds are sown thinly in rows 6 cm apart and 1.0 cm deep. The beds are covered thinly with straw or grass layer and irrigate with rose-cane. On germination (6-8 days) the beds are again drenched. After the appearance of first true life seedlings are thinned out. On the 20th day Monocrotophos or any systemic insecticide (1.5-2 ml) and on 25th day mancozeb are sprayed. During the last week of nursery, the seedlings may be hardened by slightly withholding water for better establishment of seedlings. The seedlings with 5-6 true leaves are transplanted after 30 days. About 500-700 g seed for pureline varieties and 250 g for hybrids are sufficient for one hectare area.
Sowing time- The time of sowing of seed and transplanting of seedlings varies according to the agro-climatic regions. In high hills it can be sown from Baisakh to Shrawan, in mid hills Falgun to Asar and In plains it can be successfully sown from Ashwin to Kartik.
Manure and Fertilizer- Brinjal is a heavy feeder crop. Therefore, a balance application of manure and fertilizer are very important for successful crop production. Well rotten FYM or compost @ 200-250q/ha are incorporated at the time of field preparation. About 100 kg N, 60 kg P and 60 kg K are required for one hectare area. Full dose P and K and half dose of N is applied at the time of final field preparation before transplanting and the remaining quantity of N as urea is applied in 2-3 splits after 30, 45 and 60 days after transplanting.
Transplanting- The seedlings are ready in 4-5 weeks for transplanting, when they have attained a height of 12-15 cm with 3-4 leaves. Harden the seedlings by withholding irrigation for 4-6 days prior to transplanting. Irrigate the nursery lightly before lifting of seedlings. Uproot the seedlings carefully without injury the roots. Spacing of brinjal plants depend upon the fertility status of soil, type of variety and suitability of season. In general, 60 X 45 cm spacing is kept for brinjal plants.
Irrigation- Chilli requires frequent irrigation. However, excess irrigation may lead to more vegetative growth and less fruiting while water deficiency leads to reduction in fruit setting. The first irrigation is applied soon after transplanting. The subsequent irrigations are made at 8-10 days interval or as per requirement of the crop.
Inter-culture operation and weed control- For raising a successful crop, gap filling, hoeing and mulching is required. Generally during summer and rainy season 6-8 DAP there is mortality of seedlings. In order to maintain adequate plant population, gap filling is essential. Gap filling is done in the evening and soon after the field is irrigated.
Pre-transplant surface application of Alachlor (1-1.5 kg) or Oxadiazon (1.0 kg) and post-transplant spraying of Metribuzine (0.5 kg) controls the weed very effectively.
Harvesting- The brinjal fruits are harvested when they attain full size and colour before start for ripening. Tenderness, bright colour and glossy appearance of fruits are the optimum stage for harvesting the fruits. When the fruits look dull, it is an indication of maturity.
The fruit should be severed from the plant by cutting with a sharp knife. The fleshy calyx and a short piece of the stem are left attached to the fruits.
Yield- The yield varies from season to season, variety to variety and location to location. However, in general 300-400 q/ha of healthy fruits of brinjal can be obtained.
Insect-pests
Aphids (Aphis gossypii, Myzus persicae)- The suck the cell sap from leaves and tender points.
Control-
Spray Dimethoate (0.03%) at 10 days interval starting from flowering stage.
Shoot and Fruit borer (Leucinodes orbonalis)- The tiny larvae immediately after hatching enters into plant tissue. At initial stage, it attacks on the terminal shoots and later on young fruits as soon as they start setting. The entire hole is so small that it heals up as fruit grow. Young shoots and leaf petioles show sign of wilting and dropping due to insect attack.
Spray endosulphan (0.05%) at 10 days interval starting from flowering stage.
Grow tall varieties of marigold as intercrop in a row after every 14 rows of brinjal to attract the insects.
Root Knot Nematode (Meloidogyne incognita)- Affected plants remain stunted and weak, foliage turn yellow and wilt. Knot like swelling can be seen on the roots.
Control-
Follow long term crop rotation with rice, maize or marigold.
Deep ploughing of the field during summer.
Grow resistant varieties like Sel-120, PNR 7, Hissar lalit etc.
Apply organic amendments like neem cake or mahua cake @ 25 q/ha in the soil.
Incarporate Carbofuran or Phorate or Aldicarb @ 25 kg/ha in the soil before planting.
Diseases-
Fungal diseases-
Damping off (Pythium sp., Rhizoctonia sp., Fusarium sp., Phuotophthora parasitica)- It cause damage both at pre and post emergence death of seedling. It is characterized by rapid shirinking and rotting at colar region resulting in toppling down of infected seedlings.
Control-
Provide proper drainage facility to avoid stagnant of water.
Deep ploughings during summer.
Thin sowing of seeds to avoid over crowding.
Seed treatment wit Bavistin @ 2g/kg of seed.
Phomopsis blight (Phomopsis vexans)- It is a serious disease of brinjal. The small circular spots develop on the leaves which turn grey to brown with light colour centres. The disease also attack the stem. The affected leaves become yellowish and die.
Control-
Collect the seed from healthy fruits.
Grow resistant varieties like Pusa Bhairav, Florida market etc.
Give hot water treatment to seed at 50oC for 30 minutes.
Wilt (Verticillium dahliae, Fusarium solani)- The infected plants retard growth, leaves turn yellow, lack of flowers and fruit set and finally the plant wilt and dies. Vascular tissues of stem turn dark coloured. The fungus also attack on the roots.
Control-
Follow long term crop rotation with non solanaceous crops.
Provide proper drainage.
Drench the soil with a mixture of Bavistin + Dithane M-45 (0.25%).
Spray Bavistin (0.1%).
Bacterial diseases
Bacterial wilt (Pseudomonas solonacearum)- Wilting of lower leaves followed by sudden and permanent wilting of entire plants are the typical symptom. The vascular tissues of lower stems and roots exude slimy bacterial ooze.
Control-
Adopt 3 year crop rotation with non solanaceous crops.
Raise nursery in disease free area.
Uproot infected plants and burn them.
Use resistant varieties like BT-1, BT-10 etc.
Dip seeds in Streptocyclin suspension @ 150 ppm for 90 minutes.
Spray Streptocyclin (0.25%) at 10 days interval.
Viral diseases-
Mosaic- It is characterized by TMV. Mottling of leaves and formation of dark green patches on the leaves are the characteristic symptom. The growth of infected plants is stunted and bears very few fruits. The virus is sap transmitted and also seed borne.
Control-
Follow clean cultivation.
Select virus free seeds.
Follow crop rotation excluding potato, brinjal, chilli etc.
Give hot water treatment at 50o C at 30 minutes to the seed.
Mycoplasmal Disease-
Little leaf- It is caused by mycoplasma like organism (MLO). The characteristics symptom are reduction in size of leaves, excessive growth of auxillary branches and stunting of plant growth. Affected plants give rosette like appearance. The floral parts convert into leafy structure. This disease is transmitted by leaf hopper.
Control-
Rogue out the affected plants.
Grow resistant varieties like Arka Sheel, Banaras gaint, Manjari gota etc.
Treat the seed beds with carbofuran 15-20 kg /ha followed by Tetracyaclin hydrochloride solution (500 ppm).
Spray the crop with Rogor (0.05%) at 10 days interval to control the vector.
Post-harvest handlings and storage- There are several diseases observed in brinjal after harvesting of the crop till marketing. Maximum incidence of fruit rot occurred during the monsoon months of Asoj-Mangsir when temperature and relative humidity usually remain high. Fruit rot also occurs during storage which prevented by post harvested treatments of brinjal in a solution containing 200 ppm NAA in combination with 900 ppm Prochloraz that retards fruit senescence and decaying.
Brinjal green fruits had longer shelf-life of 4 weeks based on the physiological loss in weight, discolouration, spoilage and CO2 injury during storage at 8-10oC under controlled atmosphere with initial concentration of 5% CO2. Room temperature of 20-22oC was not, however, suitable for storage under modified atmosphere. Brinjal fruits should not keep in the same store with other ethylene producing fruits. Brinjal fruits are better stored at 20oC than at 6oC and in perforated polythene bags than in open boxes. The fruits can also be stored for 7-10 days in fairly good condition at 7.2-10oC with 85-90% relative humidity.
Packing, packaging materials- The freshly harvested fruits are cleaned properly by washing them under sprinkler. They are then graded. Uniform, superior quality fruits, free from disease and insects blemishes are individually wrapped in the tissue paper and arranged in suitable cartons for exporting them to foreign markets. In Isreal, sometimes they use PVC stretch film for packing of individual fruits. Currently, they pack several fruits (10-25) pre treated with a solution of Prochloraza and NAA inside an imperforated polyethylene lining bags, together with 10 layers of tissue paper to prevent water condensation. The method prevents weight loss and maintains fruit quality during 14 days of storage at 12oC for 17 days at 20oC and helps in exporting of brinjal to other countries. eggplant.com
Cultivation practices of Knol khol
Common names: kohlrabi,
turnip-rooted cabbage, stem
turnip, turnip cabbage
Botanical name: Brassica
caulorapa
Origin: horticultural hybrid
Varieties
Early White Vienna (55 days);
Early Purple Vienna (60 days).
Description
Kohlrabi is a hardy biennial
grown as an annual and is a
member of the cabbage clan. It
has a swollen stem that makes it
look like a turnip growing on a
cabbage root. This swollen stem
can be white, purple, or green,
and is topped with a rosette of
blue-green leaves. In German,
kohl means cabbage and rabi
means turnip—a clue to the
taste and texture of kohlrabi,
although it is mild and sweeter
than either of them. Kohlrabi is a
fairly recent addition to the
vegetables grown in northernEurope. In this country, nobody
paid it any attention until 1800,
Where and when to grow
All cole crops are hardy and can
tolerate low 20°F temperatures.
Kohlrabi tolerates heat better
than other members of the
cabbage family, but planting
should be timed for harvesting
during cool weather. Kohlrabi
has a shorter growing season than
cabbage. It grows best in cool
weather and produces better with
a 10° to 15°F difference between
day and night temperatures. If
your area has cold winters, plant
for summer to early fall harvest. In
the South, plant for harvest in
late fall or winter. With spring
plantings, start kohlrabi early so
that most growth will occur before
the weather gets too hot.
How to plant
Kohlrabi likes fertile, well-
drained soil with a pH within
the 6.5 to 7.5 range; this
discourages disease and lets the
plant make the most of the
nutrients in the soil. The soil
should be high in organic
matter. When you're preparing the
soil for planting, work in a
complete, well-balanced fertilizer
at the rate of one pound per 100
square feet or 10 pounds per 1,000
square feet. Cole crops are
generally grown from transplants
except where there's a long cool
period. Kohlrabi, however, can be
grown directly from seed in the
garden. Sow seeds in rows 18 to 24
inches apart and cover them
with a quarter to a half inch of soil.
When the seedlings are growing
well, thin them to five or six inches
apart—you can transplant the
thinnings. Cultivate carefully to
avoid harming the shallow roots.Fertilizing and watering
Fertilize before planting and
again at midseason, at the same
rate as the rest of the garden.
Detailed information on fertilizing
is given in "Spadework: The
Essential Soil" in Part 1. Kohlrabi
should have even moisture or it
will become woody.
Pests
The cabbage family's traditional
enemies are cutworms and
caterpillars. Cutworms,
cabbage loopers, and imported
cabbage worms can all be
controlled by spraying with
bacillus thuringiensis, an
organic product also known as
Dipel or Thungicide. Detailed
information on pest control is
given in "Keeping Your Garden
Healthy" in Parti.
Diseases
Cabbage family crops are
susceptible to yellows, clubroot,
and downy mildew. Lessen the
incidence of disease by planting
disease-resistant varieties when
they're available; maintaining the
general health of your garden;
and avoiding handling the plants
when they're wet. If a plant does
become infected, remove and
destroy it so it cannot spread
disease to healthy plants. Detailed
information on disease
prevention is given in "Keeping
Your Garden Healthy" in Part 1.
Storing and preserving
Kohlrabi will store for one week
in a refrigerator or for one to two
months in a cold, moist place.
Kohlrabi can also be frozen.
Detailed information on storing
and preserving is given in Part 3.
Serving suggestions
Small, tender kohlrabi are
delicious steamed, without
peeling. As they mature you can
peel off the outer skin, dice them,
and boil them in a little water.
Kohlrabi can also be stuffed, like
squash-
Try young kohlrabi raw,
chilled, and sliced; the flavor is
mild and sweet, and the
vegetable has a nice, crisp texture.
You can also cook kohlrabi,
then cut it into strips and marinate
the strips in an oil and vinegar
dressing; chill this salad to serve
with cold cuts. Cooked kohlrabi
can be served just with seasoning
and a little melted butter or
mashed with butter and cream. For
a slightly different flavor, cook it
in bouillon instead of water.
Serving suggestions
Small, tender kohlrabi are
delicious steamed, without
peeling. As they mature you can
peel off the outer skin, dice them,
and boil them in a little water.
Kohlrabi can also be stuffed, like
squash-
Try young kohlrabi raw,
chilled, and sliced; the flavor is
mild and sweet, and the
vegetable has a nice, crisp texture.
You can also cook kohlrabi,
then cut it into strips and marinate
the strips in an oil and vinegar
dressing; chill this salad to serve
with cold cuts. Cooked kohlrabi
can be served just with seasoning
and a little melted butter or
mashed with butter and cream. For
a slightly different flavor, cook it
in bouillon instead of water.
turnip-rooted cabbage, stem
turnip, turnip cabbage
Botanical name: Brassica
caulorapa
Origin: horticultural hybrid
Varieties
Early White Vienna (55 days);
Early Purple Vienna (60 days).
Description
Kohlrabi is a hardy biennial
grown as an annual and is a
member of the cabbage clan. It
has a swollen stem that makes it
look like a turnip growing on a
cabbage root. This swollen stem
can be white, purple, or green,
and is topped with a rosette of
blue-green leaves. In German,
kohl means cabbage and rabi
means turnip—a clue to the
taste and texture of kohlrabi,
although it is mild and sweeter
than either of them. Kohlrabi is a
fairly recent addition to the
vegetables grown in northernEurope. In this country, nobody
paid it any attention until 1800,
Where and when to grow
All cole crops are hardy and can
tolerate low 20°F temperatures.
Kohlrabi tolerates heat better
than other members of the
cabbage family, but planting
should be timed for harvesting
during cool weather. Kohlrabi
has a shorter growing season than
cabbage. It grows best in cool
weather and produces better with
a 10° to 15°F difference between
day and night temperatures. If
your area has cold winters, plant
for summer to early fall harvest. In
the South, plant for harvest in
late fall or winter. With spring
plantings, start kohlrabi early so
that most growth will occur before
the weather gets too hot.
How to plant
Kohlrabi likes fertile, well-
drained soil with a pH within
the 6.5 to 7.5 range; this
discourages disease and lets the
plant make the most of the
nutrients in the soil. The soil
should be high in organic
matter. When you're preparing the
soil for planting, work in a
complete, well-balanced fertilizer
at the rate of one pound per 100
square feet or 10 pounds per 1,000
square feet. Cole crops are
generally grown from transplants
except where there's a long cool
period. Kohlrabi, however, can be
grown directly from seed in the
garden. Sow seeds in rows 18 to 24
inches apart and cover them
with a quarter to a half inch of soil.
When the seedlings are growing
well, thin them to five or six inches
apart—you can transplant the
thinnings. Cultivate carefully to
avoid harming the shallow roots.Fertilizing and watering
Fertilize before planting and
again at midseason, at the same
rate as the rest of the garden.
Detailed information on fertilizing
is given in "Spadework: The
Essential Soil" in Part 1. Kohlrabi
should have even moisture or it
will become woody.
Pests
The cabbage family's traditional
enemies are cutworms and
caterpillars. Cutworms,
cabbage loopers, and imported
cabbage worms can all be
controlled by spraying with
bacillus thuringiensis, an
organic product also known as
Dipel or Thungicide. Detailed
information on pest control is
given in "Keeping Your Garden
Healthy" in Parti.
Diseases
Cabbage family crops are
susceptible to yellows, clubroot,
and downy mildew. Lessen the
incidence of disease by planting
disease-resistant varieties when
they're available; maintaining the
general health of your garden;
and avoiding handling the plants
when they're wet. If a plant does
become infected, remove and
destroy it so it cannot spread
disease to healthy plants. Detailed
information on disease
prevention is given in "Keeping
Your Garden Healthy" in Part 1.
Storing and preserving
Kohlrabi will store for one week
in a refrigerator or for one to two
months in a cold, moist place.
Kohlrabi can also be frozen.
Detailed information on storing
and preserving is given in Part 3.
Serving suggestions
Small, tender kohlrabi are
delicious steamed, without
peeling. As they mature you can
peel off the outer skin, dice them,
and boil them in a little water.
Kohlrabi can also be stuffed, like
squash-
Try young kohlrabi raw,
chilled, and sliced; the flavor is
mild and sweet, and the
vegetable has a nice, crisp texture.
You can also cook kohlrabi,
then cut it into strips and marinate
the strips in an oil and vinegar
dressing; chill this salad to serve
with cold cuts. Cooked kohlrabi
can be served just with seasoning
and a little melted butter or
mashed with butter and cream. For
a slightly different flavor, cook it
in bouillon instead of water.
Serving suggestions
Small, tender kohlrabi are
delicious steamed, without
peeling. As they mature you can
peel off the outer skin, dice them,
and boil them in a little water.
Kohlrabi can also be stuffed, like
squash-
Try young kohlrabi raw,
chilled, and sliced; the flavor is
mild and sweet, and the
vegetable has a nice, crisp texture.
You can also cook kohlrabi,
then cut it into strips and marinate
the strips in an oil and vinegar
dressing; chill this salad to serve
with cold cuts. Cooked kohlrabi
can be served just with seasoning
and a little melted butter or
mashed with butter and cream. For
a slightly different flavor, cook it
in bouillon instead of water.
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