Banana Fruit
Complete Exam Notes
General Overview
| Particular | Information |
|---|---|
| Common Name | Banana |
| Scientific Name | Musa spp. |
| Family | Musaceae |
| Chromosome No. | 2n = 22 (Diploid), 33 (Triploid) |
| Fruit Type | Berry |
| Edible Portion | Mesocarp & Endocarp |
| True Stem | Rhizome |
| False Stem | Pseudostem (Overlapping leaf sheaths) |
| Inflorescence | Terminal Spadix |
| Fruit Development | Parthenocarpy |
| Economic Value | Rich in carbohydrates, potassium, Vitamin B6 & C |
Origin, Species & Production
Geographic Information
| Centre of Origin | Southeast Asia (Malaysia–Indonesia Region) |
| Top Producer | India (25–27% global share) |
| Top Exporter | Ecuador |
| Top States (IN) | Andhra Pradesh, Maharashtra, Tamil Nadu |
| Research Hub | ICAR-NRCB, Tiruchirappalli, Tamil Nadu |
Important Species & Genomic Groups
| Species / Genome | Key Characteristics / Examples |
|---|---|
| Musa acuminata (A) | Dessert banana, excellent fruit quality |
| Musa balbisiana (B) | Cooking banana, disease & drought tolerant |
| AAA Group | Dwarf Cavendish, Grand Naine, Robusta |
| AAB Group | Nendran, Poovan, Rasthali |
| ABB Group | Monthan, Karpuravalli, Saba |
Climate, Soil & Spacing
Climatic & Soil Parameters
| Opt. Temperature | 20–30°C (Ideal: 26–30°C) |
| Annual Rainfall | 100–250 cm |
| Relative Humidity | 75–85% |
| Ideal Soil Type | Deep, fertile, well-drained loam to clay loam |
| Soil pH Range | 6.0–7.5 |
| Unsuitable Soils | Waterlogged, saline, and highly acidic soils |
Plant Density & Spacing
| Spacing | Plant Population / ha |
|---|---|
| 2.0 × 2.0 m | 2,500 plants |
| 1.8 × 1.8 m | ~3,086 plants |
| 1.5 × 1.5 m (HDP) | ~4,444 plants |
Propagation & Planting
Planting Materials
| Sword Sucker | Best suckers; narrow leaves, strong rhizome |
| Water Sucker | Not recommended; broad leaves, weak plant |
| Tissue Culture | Modern method; uniform, disease-free, high-yielding |
Planting Material Treatment
| Operation | Recommendation |
|---|---|
| Sucker Trimming | Remove old roots and damaged tissues |
| Fungicide Dip | Carbendazim @ 2 g/L for 15–20 minutes |
| Tissue Culture | Harden in nursery before field transplanting |
Irrigation & Nutrition
Irrigation Standards
| Young Plants | Every 3–5 days (summer) |
| Mature Crop | Every 5–7 days |
| Best Method | Drip Irrigation (Saves 40–60% water) |
| Critical Stage | Bunch Development & Flowering |
⚠️ Critical Period Rule
Bunch development is the most critical stage for moisture. Moisture stress during flowering and fruit filling severely reduces bunch weight and finger quality.
Nutrient Management (Per Plant/Year)
| Nutrient | Recommended Dose |
|---|---|
| Organic Manure (FYM) | 10–20 kg/plant/year |
| Nitrogen (N) | 200–300 g/plant/year |
| Phosphorus (P₂O₅) | 60–90 g/plant/year |
| Potassium (K₂O) | 200–300 g/plant/year |
Micronutrient Deficiencies
| Element | Symptom | Management |
|---|---|---|
| Zinc (Zn) | Small leaves, poor plant growth | Zinc sulphate spray |
| Boron (B) | Poor fruit filling, fruit cracking | Borax spray |
| Magnesium (Mg) | Yellowing of older leaves | Magnesium sulphate spray |
| Iron (Fe) | Interveinal chlorosis in young leaves | Ferrous sulphate spray |
Pests & Diseases
Major Diseases
| Disease | Causal Organism | Key Symptoms |
|---|---|---|
| Panama Wilt | Fusarium oxysporum f. sp. cubense | Yellowing of older leaves, vascular discoloration |
| Yellow Sigatoka | Pseudocercospora musae | Yellow streaks changing to brown spots |
| Bunchy Top (BBTD) | Banana bunchy top virus (BBTV) | Rosette upright leaves; vector: Banana Aphid |
| Anthracnose | Colletotrichum musae | Black sunken spots on fruits |
Major Insect Pests
| Pest Name | Scientific Name | Key Damage & Control |
|---|---|---|
| Rhizome Weevil | Cosmopolites sordidus | Tunnels in rhizome; clean planting material, pheromone traps |
| Banana Aphid | Pentalonia nigronervosa | Sap sucking; vector of BBTV virus |
| Pseudostem Weevil | Odoiporus longicollis | Bores holes in pseudostem; destroy affected plants |
| Burrowing Nematode | Radopholus similis | Root damage, toppling of plants |
Intercultural & Disorders
Key Cultural Operations
| Desuckering | Removal of unwanted suckers to save nutrients |
| Denavelling | Removal of male bud after last hand creation |
| Propping | Providing bamboo/poly supports to heavy bunches |
| Earthing Up | Mounding soil around base to prevent lodging |
| Bunch Covering | Protecting fruits using sleeve bags |
Physiological Disorders
| Disorder | Causative Factor | Remedial Measure |
|---|---|---|
| Choke Throat | Low temperatures, poor nutrition | Balanced fertilizer & irrigation |
| Finger Drop | Weak fruit attachment, late harvest | Harvest at proper green maturity |
| Sun Scald | Direct intense solar radiation | Bunch covering with sleeve bags |
| Fruit Cracking | Irregular irrigation & Boron deficiency | Uniform watering + Borax spray |
Important Varieties
| Variety | Genome | Importance / Usage |
|---|---|---|
| Grand Naine (G-9) | AAA | High yield, ideal for export & tissue culture |
| Dwarf Cavendish | AAA | Commercial dwarf variety, heavy bunches |
| Poovan | AAB | Sweet fruit, widely grown in South India |
| Rasthali | AAB | Choice dessert variety, unique flavor |
| Nendran | AAB | Premier cooking & banana chip processing variety |
| Monthan | ABB | Mainly used for culinary/cooking purposes |
| FHIA-01 | Hybrid | Resistant to Panama wilt & Sigatoka |
Harvesting & Storage
| Time to Harvest | 11–15 months after planting |
| Harvest Index | Full fruit size, angles become rounded |
| Storage Temp. | 13–14°C (RH: 90–95%) |
| Chilling Injury | Occurs if stored below 13°C |
| Ripening Temp. | 18–22°C |
| Recommended Agent | Ethylene gas (100–150 ppm) |
| Unsafe Ripening | Calcium Carbide (Prohibited) |
Authentic Previous Year Questions
Q: Banana belongs to which botanical family?
Ans: Musaceae
Q: What is the true stem of a banana plant called?
Ans: Rhizome
Q: Which sucker type is preferred for commercial planting?
Ans: Sword Sucker
Q: Causal organism of Panama Wilt disease in banana?
Ans: Fusarium oxysporum f. sp. cubense
Q: Insect vector responsible for transmitting Bunchy Top virus?
Ans: Banana Aphid (Pentalonia nigronervosa)
Q: Which banana variety is primarily used for making banana chips?
Ans: Nendran
Q: What is the safe recommended cold storage temperature for banana?
Ans: 13–14°C (Chilling injury occurs below 13°C)
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