fabioclass

CULTIVATION OF ORANGE (CITRUS SINENSIS)


ORANGE (Citrus sinensis)

Orange is a fruit crop which belongs to the citrus family. The fruit of orange called berry is succulent, fleshy and juicy and it is rich in vitamins and minerals.

Land Preparation for the planting of orange

: The land is cleared with cutlass and stumping is done. The land is then ploughed and harrowed mechanically.

Varieties/Cultivars of Orange

Varieties of the Citrus spp. or family include:
Varieties Botanical names
1 Sweet orange Citrus sinensis
2 Sour orange Citrus aurantium
3 Lime Citrus aurantifolia
4 Lemon Citrus lemon
5 Tangerine Citrus reticulata
6 Grape fruit Citrus paradisi
7 Shaddock (Pomelo) Citrus grandis
8 King orange Citrus nobilis


Climatic and soil requirements for planting orange

Sweet orange requires a temperature of 25°C - 35°C, rainfall of 75cm -125cm per annum and a well-drained fertile and deep soil. It also requires a higher elevation and slightly sloping land.




Planting materials for the cultivation of orange

(i) Seeds (ii) Budded seedlings (iii) Grafted seedlings. Method of propagation: Sexually (by seeds) and vegetative propagation, e.g. budding.

Planting date for Orange

: (i) Pre-nursery is ideal between October and December and nursery in April and May. (iii) Budding is done a year later.




Spacing

: (i) Pre-nursery is 3cmx 3cm,
(i) Nursery is 60cm x 60cm (iii) Fieldis7.Omx7.Om.
(ii) Field is 7.0m x 7.0m

Nursery Practices in the cultivation of orange

Pre-nursery: (i) The seeds are raised in seed trays by October – December in a loamy soil, rich in organic matter. (ii)The seeds are sown 3cm x 3cm at 2cm deep.
Nursery: (i) The seedlings are now replanted at 60cm x 60cm spacing. (ii)It is planted around April/ May. (iii)Watering, wedding and shading are provided. (iv)Budding and grafting are done a year later.

Transplanting

: After one year of budding, the seedlings are transplanted to the field at a spacing of 7.0cm x 7.0m

Cultural Practices in the cultivation of orange

(i) Weeding
This is done regularly by cutlassing or by herbicides
(ii) Fertilizer application
Sulphate of ammonium at the rate of 350kg/ha is applied by ring method at regular intervals.

(iii) Mulching is also done during dry season
(iv) Irrigation, especially during dry season, is also practiced.
(v) Pruning can also be done
(vi) Insects and diseases should be controlled and prevented





Maturity period of orange

: This occurs between three and seven years.
Process of Harvesting orange: Clean or spot-picking of matured or ripe fruits with hand or harvesting knife is done carefully and over a period of time.

Processing and storage of orange

: Orange can be processed into orange Juice which can be stored in canned or bottled form.

PESTS OF ORANGE AND CONTROL METHODS


(1))Thrips (2) Red Mites (3) Scale 4) bids (5) Fruit borers (6)Caterpillars. All these pests of citrus attacks leaves, flowers and fruits

Control: Spray with insecticides like Gammalin 20 and Malathion.
(7) Leafhoppers: These attack citrus leaves, leading to defoliation and reduced yield.
Control:
(i) By handpicking;
(ii) Use poison baits.

Diseases of Orange and control methods

(1) Gummosis: It is caused by a fungus Phytophthora spp which is spread by air and through the soil. Symptoms of the disease include rottening of the bark near the ground. Drying and cracking of hark, release (exude) of gum or slimy substance and leaves turn yellow and begin to die back.
Control:
(i) Use resistant varieties.
(ii) Spray with appropriate fungicides.
(iii) Paint the trunk with crude carbolic and water.

(2) Tristeza: It is a viral disease transmitted by aphid. Symptoms include phloem necrosis and swelling at bud union.

Control:
Use resistant varieties.

(3) Citrus Scab: It is a 1ngal disease (Sphaceloma faucet) which spreads within the soil. It attacks young leaves and stem, especially in nursery stage.
Control: Treat with fungicide e.g. Fordeaux mixture.

HERE YOU WILL FIND EVERY AVAILABLE TOPICS ABOUT AGRICULTURAL SCIENCE AND BIOLOGY. AND THE LINKS TO THEIR VARIOUS SOURCES.
1. DEVELOPMENT OF AGRICULTURE
2. IMPORTANCE OF AGRICULTURE
3. SUBSISTENCE AGRICULTURE
4. COMMERCIAL AGRICULTURE
5. PROBLEM OF AGRICULTURAL DEVELOPMENT
6. SOLUTIONS TO POOR AGRICULTURAL DEVELOPMENT
7. AGRICULTURAL LAWS AND REFORMS
8. ROLES OF GOVERNMENT IN AGRICULTURAL DEVELOPMENT
9. AGRICULTURAL POLICIES
10. PROGRAM PLANNING IN AGRICULTURE
34.
FORESTRY
35. WILDLIFE CONSERVATION
36. FACTORS AFFECTING LAND AVAILABILITY
37. TOPOGRAPHY
38. SOIL
39. BIOLOGICAL FACTORS
40. SOCIAL-ECONOMIC FACTORS
41. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
42. CLIMATIC FACTORS AFFECTING AGRICULTURAL PRODUCTION
43. TEMPERATURE
44. RAINFALL
45. WIND
46. SUNLIGHT
47. SOLAR RADIATION
48. BIOTIC FACTOR AND AGRICULTURAL PRODUCTION
49. PESTS
50. BIRDS
51. DISEASES
52. SOIL MICRO-ORGANISMS
53. SOIL PH
54. ROCK FORMATION
55. IGNEOUS ROCK
56. SEDIMENTARY ROCKS
57. METAMORPHIC
58. SOIL AND ITS FORMATION
59. FACTORS OF SOIL FORMATION
60. LIVING ORGANISM
61. PARENT MATERIALS
62. SOIL FORMATION TOPOGRAPHY
63. PROCESS OF SOIL FORMATION
64. WEATHERING
65. PHYSICAL WEATHERING
66. CHEMICAL WEATHERING
67. PRESSURE
68. WATER
73. BIOLOGICAL WEATHERING
74. CHEMICAL AND BIOLOGICAL COMPOSITION OF THE SOIL
75. SOIL WATER
76. MICRO AND MACRO NUTRIENTS
77. SOIL MICRO ORGANISM
78. PROPERTIES OF SOIL
79. SOIL STRUCTURE
80. SANDY SOIL CLAY SOIL LOAMY SOIL
83. SOIL TEXTURE
84. IDENTIFICATION OF SOIL TYPES THROUGH EXPERIMENTS
85. RETENTION OF WATER BY VARIOUS SOIL TYPES
86. DETERMINATION OF SOIL PH REACTION
87. COLORIMETRIC DETERMINATION OF SOIL PH LEVEL
88. PH SOIL TEST
89. PLANT NUTRIENTS
soil improvement techniques
90. MACRO NUTRIENTS IN GENERAL
112. THE MAINTENANCE OF SOIL FERTILITY
113. CROP ROTATION
114. APPLICATION OF ORGANIC MANURES FARM YARD MANURE APPLICATION OF INORGANIC MANURE
117. LIMING
118. FARMING PRACTICES
119. BUSH BURNING CLEARING
121. FERTILIZER APPLICATION
122. ORGANIC MANURING FARM YARD MANURE
124. HUMUS
125. COMPOST
126. CROP ROTATION
133. FARM POWER AND MACHINERY
134. SOURCES OF FARM POWER
135. HUMAN SOURCE
149. PLOUGHS
142. FIELD MACHINES
157. PLANTERS
164. SIMPLE FARM TOOLS
165. AGRICULTURAL MECHANIZATION
166. THE CONCEPT OF MECHANIZATION





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