radish
DESCRIPTION
radish, nhbTRANSCRIPT
RadishArea Under Cultivation
The main radish growing states are West Bengal, Bihar, Uttar Pradesh, Karnataka, Punjab and
Assam.
Botanical Name : Raphanus sativus
Family : Cruciferae
Plant Discription :
Nutritional Levels :
It is an annual or biennial herb having rosette leaves and bearing a swollen root which is the
economic part.
Centre of origin : Mediterranean region
Pollination system : Cross pollinated
Chromosome no : 2n=18
Moisture Protein Fat Mineral matter Fibre Carbohydrate Calories(%) (%) (%) (%) (%) (%) (K Cal)
90.8 0.6 0.3 0.9 0.6 6.8 32
Minerals
Phosphorus Potassium Calcium Magnesium Iron Sodium Copper (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
20 10 50 196 0.37 63.5 0.07
Manganese Zinc Sulphur Chlorine Molybdium Cromium(mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
0.15 0.68 0 0 0 0.009
Vitamins
Carotene Thiamine Riboflavin Niacin Vitamin C Choline Folic acid-Free(mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
3 0.06 0.02 0.4 17 0 0
Folic acid- Total(mg/100g)
0
Moisture Protein Fat Mineral matter Fibre Carbohydrate Calories(%) (%) (%) (%) (%) (%) (K Cal)
90.8 0.6 0.3 0.9 0.6 6.8 32
Phosphorus Potassium Calcium Magnesium Iron Sodium Copper (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
20 10 50 196 0.37 63.5 0.07
Manganese Zinc Sulphur Chlorine Molybdium Cromium(mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
0.15 0.68 0 0 0 0.009
Carotene Thiamine Riboflavin Niacin Vitamin C Choline Folic acid-Free(mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g) (mg/100g)
3 0.06 0.02 0.4 17 0 0
Folic acid- Total(mg/100g)
0
Minerals
Vitamins
RadishDiseases
Alternaria Blight (Alternaria raphani):
The pathogen affects leaves, stem, pods and seeds. Symptoms of the disease first appear on the
leaves of seed stem in the form of small, yellowish, slightly raised lesions. Lesions appear later on the
stems and seed pods. Infection spreads rapidly during rainy weather, and the entire pod may be so
infected that the styler end becomes black and shrivelled. The fungus penetrates in pod tissues,
ultimately infecting the seeds. The infected seed fails to germinate.
Control: Though hot water treatment of the seed kills the fungus, use of diseases- free seeds is
recommended. Regular spraying with Difolatan (0.3%) or Dithane M 45 (0.2%) or Ridomil (0.1%)
controls the disease effectively.
White Rust (Albugo candida):
Disease attacks the leaves and flowering shoots. Affected flowering shoots get deformed and bear
only malformed flowers. White powdery substance in patches is observed on the under surface of the
leaves.
Control: Clean cultivation and use of resistant varieties help to prevent the disease. Regular spraying
with Dithane Z 78 (0.2%) effectively controls the disease.
Root Rot of Radish (Erwinia rhapontici)
It is a bacterial disease, which spreads through implements and irrigation water. Symptoms appear as
rotting of pith tissues resulting in cavity formation and wilting of plants. The disease spreads when the
roots are transplanted for seed production.
Control: Dipping of the seeds in a solution of Agrimycin-100 (100 ppm) at the time of sowing is
effective in checking the disease.
Radish Mosaic Virus (RMV):The symptoms first appear as small, circular to irregular, chlorotic lesion in between and adjacent to
the veins. Little or no leaf distortion is noticed and stunting or abnormal formation rarely occurs. It is
transmitted through aphids.
Control: The disease can be effectively checked by controlling aphids with 2-3 foliar sprays of either
Dimecron (0.05%) or Monocrotophos (0.05%) at 10 days interval.
Radish Phyllody:The disease is transmitted by jassid Orosius albicinctus. The diseased plant assumes a dull grey to
light violet colouration. The symptoms of the disease appear at the time of flowering when all the floral
parts become green violet and leafy. The sepals and petals become green thick knob headed leaves.
Generally, the whole plants show symptoms of the disease. If the infection occurs at an early stage of
growth in the nursery then the whole plant is affected.
Control: One or two sprays of Monocrotophos (0.05%) or Phosphamidon (0.05%) or Oxydemetan
Methyl (0.02%) is done to eradicate the jassids - the vector of the virus. Soil application of Thimet 10-G
(1.5 kg a.i./ha) is also recommended. The application of Thimet should be followed by irrigation.
RadishHarvesting
The edible roots become ready for harvesting in about 25-60 days depending on the variety. The
temperate types reach harvest maturity 25-30 days after seed sowing while tropical varieties require
longer period. At the time of harvest, the roots should not be pithy or solid.
Crop is harvested manually by uprooting individual plant. A light irrigation may be given a day before
harvesting to facilitate lifting of roots.
Yield
The average yield of Asiatic cultivars ranged between 25-35 t/ha in 40-60 days while the temperate
varieties yield 15-20 t/ha in 35-40 days.
RadishIntercultural Operations
Intercultural operations like weeding and hoeing are necessary to check the weed growth and provide
soil aeration for better growth and yield.
During rainy season, two weddings are required to keep the growth of weeds under check. In radish,
the growing roots tend to push out of the soil surface. Therefore, earthing up and weeding during the
early stages of growth are necessary for proper development of quality roots.
RadishIrrigation
The irrigation cycle depends upon season, type of soil and amount of organic matter present in soil.
The first irrigation is given immediately after sowing. Depending upon the planting season and the
available soil moisture, radish may be irrigated at 10-12 days interval during winter and 5-6 days
interval during summer.
RadishManuring & Fertilization
The fertilizer dose depends upon the fertility of soil and amount of organic manure applied to the crop.
For a good yield, 15-20 tonnes of well-decomposed FYM is incorporated into the soil. Generally,
application of 50-100 kg N, 100kg P O and 50 kg K O is recommended for optimum yield. Half dose 2 5 2
of N and full dose of P and K is given at the time of planting. The balance half of N is given 30 days after
planting. As the feeder roots are well distributed in 25cm layer therefore, fertilizers should be
ploughed to a depth of 25cm, particularly in dry weather, instead of applying them on the soil surface.
RadishPests
Aphids (Myzus persicae, Brevicoryne brassicae, Lipaphis erysimi)The pest attacks both the seedlings as well as the mature crop. The nymphs and adults suck the cell
sap and devitalize plants. Affected parts become discolored and malformed. High humidity favours
rapid multiplication of this pest. The aphids are mostly observed on the lower surface of the leaves.
Control: Spraying of Monocrotophos (0.05%) or Malathion (0.1%) at 10-15 days interval contains
aphid population effectively. To prevent recurrence of the pest granular insecticides like Phorate @ 1.0
kg a.i./ha should be applied to soil.
Mustard Sawfly (Athalia proxima)
It is a serious pest of radish. The pest attack is observed in the vegetative and flowering stage of the
crop. The adult female lays eggs inside the leaf tissue. The grubs after hatching from the eggs feed on
the leaves by making small holes.
Control: Hand picking of larvae when the area involved is small, or spraying with Malathion 50 EC
(1ml/litre of water) twice at an interval of 10 days is recommended.
RadishPost Harvest Technology
Grading
Harvested roots are washed and graded according to size and tied into bunches along with the tops.
The radish should ideally, be of uniform and similar shape for the variety, well formed, smooth, firm but
of tender texture. It should also be free from harvest damage, decay, disease or insects. Bunched
radish tops should be fresh in appearance and turgid.
Packaging
Normally the produce is sent to the market loose or sometimes it is packed in gunny bags.
Storage
Radish cannot be stored at room temperature for more than 2-3 days. However in cold storage, O
topped radish if packed in polybag with few holes for aeration, can be stored at 0 C with 90-95 %
relative humidity for about 2 months.
RadishPlanting
Land preparation :The land should be thoroughly ploughed so that the clods do not interfere with the root development.
Well decomposed FYM (15-20 t/ha) is mixed at the time of land preparation. Application of fresh
undecomposed FYM should be avoided as it leads to forking of the fleshy roots.
Season of Planting :st stThe crop is sown during winter from September to January, in the plains from 1 September-1
December and in the hills from June September. In the mild climate of peninsular India, radish can be
grown almost all the year round except few summer months. The best sowing time in South India is
from April to June.
Method of Planting :For regular supply of fresh and tender roots, the sowing should be staggered and done at 15 or 20 days
interval. The seed rate of 10-12 kg/ha is recommended. Radish is a usually grown on ridge to facilitate
good root development. The seeds of tropical varieties are sown at a spacing of 45 x 8 cm while a
spacing of 20-30 x 8 cm is recommended for temperate varieties.
RadishSoil & Climate
Soil:
Radish is ideally grown on light, friable sandy-loam soils which are rich in humus and having a pH
range between 6.0-7.0. Heavy soils should be avoided as they produce rough, malformed roots with
number of small fibrous laterals.
Climate:
Radish is very specific in its climatic requirements especially, temperature.
Radish is predominantly suited to a cool or moderate climate. A long day as well as high temperature
results in boltings before proper root development. Also, the roots become hard, pithy and pungent
before reaching maturity. It develops best flavour, texture and size at cooler temperatures between 10-0
15 C.
RadishVarieties
Asiatic Types or tropical types :
Pusa Desi
It is a subtropical cultivar, suitable for sowing from middle of August to October in the northern plains
Roots are pure white, 30-35 cm long, tapering with green stem end, It matures in 50-55 days after
sowing. Suitable for sowing in northern India from mid-August to mid- October.
Pusa Chetki
This variety has wider adaptability and can tolerate high temperature. Suitable for growing mid- March
to mid- August in northern and central parts of India. In southern and western parts of India It can be
grown throughout the year. Roots are medium long, stumpy, pure white, mildly pungent and mature in
40-45 days. It is grown as a summer and monsoon crop from April September.
Pusa Reshmi
The roots are 30-45cm long, white with green tinge on top. Suitable for early sowing from mid-
September to mid-November but it can tolerate slightly higher temperature. Roots are ready for
harvesting in about 55- 60 days.
Japanese White
The roots are cylindrical 25-30 cm long and 5 cm in diameter, skin pure white, flesh crisp, solid and
mildly flavoured. Suitable for growing between October- December in the plains and July September
in the hills. Crop matures in 60-65 days.
Punjab Safed
Roots are white tapering, smooth, mild in taste, free of forking, 30-40 cm in length and 3-5 cm thick.
Crop matures in 50-60 days. Suitable for sowing in September-October. It is a quick growing type with
roots remaining edible for 10 days after attaining full size.
Kalianpur No. 1
Roots 20-23 cm long, white with green shoulder.
Nadauni
Roots are long, light pink, popular in Himachal Pradesh.
Arka Nishant
Roots are long, marble white, resistant to pithiness and pre- mature bolting. Chinese Pink Roots 12-
15 cm long, semi-stumpy to stumpy, pink with white colour towards the tip. The skin is shining red and
smooth and the flesh is white, crisp, solid and mildly pungent. Crop matures in 50-55 days.
European types or temperate types :
Pusa Himani
Sowing is done in northern plains from December February. Roots are 30-35 cm in length and 10-
12 cm in diameter. Rots are pure white with green stem end. They are semi-stump to tapering with
short tops. The skin is pure white, the flesh is crisp and sweet- flavoured with mild pungency. Crop
matures in 55 days. It is the only variety, which can be grown throughout the year in the hills except
for winter months from November-January.
White Icicle
It is a medium short European table variety, which matures in 25-30 days. The roots are 12-15 cm
long, 2-3 cm in diameter. Sowing time from mid-October to February. The skin is pure white, while
the flesh is icy white, juicy and sweet- flavoured. Suitable for kitchen garden.
Rapid Red White Tipped
It is an extra early European Table type, which matures in 25-30 days. The roots are smooth,
small, round, bright red with white tip, flesh pure white crisp and snappy. Sowing time from mid-
October to February