🥭 Tropical Fruits — Mango, Banana, Papaya & Guava
Study mango, banana, papaya and guava cultivation for CUET Agriculture. Varieties like Alphonso-Dasheri, propagation and post-harvest handling.
India is the second-largest producer of fruits in the world after China. Horticulture contributes approximately 33% to the agriculture GDP, highlighting its immense economic importance. Fruit crops provide higher returns per hectare compared to field crops and play a crucial role in food security, nutrition, and rural employment. Understanding the cultivation practices of major fruit crops is essential for CUET Agriculture Section II.
NOTE
India holds the distinction of being the largest producer of Mango and Banana globally, while ranking second overall in total fruit production after China.
1. Mango (Mangifera indica)
Mango (Mangifera indica) — King of Fruits — Source: Wikimedia Commons (CC)
- Family: Anacardiaceae
- Origin: Indo-Burma region (North-East India & Myanmar)
- Chromosome number: 2n = 40
- National Fruit of India; India is the largest producer of mango globally, contributing about 40% of world production
IMPORTANT
Mango is the National Fruit of India and the crop with the largest fruit crop area in India. It originated in the Indo-Burma region. These three facts are among the most frequently tested in CUET.
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India is the second-largest producer of fruits in the world after China. Horticulture contributes approximately 33% to the agriculture GDP, highlighting its immense economic importance. Fruit crops provide higher returns per hectare compared to field crops and play a crucial role in food security, nutrition, and rural employment. Understanding the cultivation practices of major fruit crops is essential for CUET Agriculture Section II.
NOTE
India holds the distinction of being the largest producer of Mango and Banana globally, while ranking second overall in total fruit production after China.
1. Mango (Mangifera indica)
Mango (Mangifera indica) — King of Fruits — Source: Wikimedia Commons (CC)
- Family: Anacardiaceae
- Origin: Indo-Burma region (North-East India & Myanmar)
- Chromosome number: 2n = 40
- National Fruit of India; India is the largest producer of mango globally, contributing about 40% of world production
IMPORTANT
Mango is the National Fruit of India and the crop with the largest fruit crop area in India. It originated in the Indo-Burma region. These three facts are among the most frequently tested in CUET.
Climate & Soil
- Tropical and subtropical climate; temperature range 24-30 degrees C
- Cannot tolerate frost; dry weather during flowering is ideal because rain during flowering promotes fungal infection of the panicle
- Well-drained alluvial or laterite soil; pH 5.5-7.5
Important Varieties
| Region | Varieties |
|---|---|
| North India | Dasheri, Langra, Chausa, Bombay Green, Lucknow Safeda |
| South India | Alphonso (Hapus), Banganapalli, Totapuri, Neelum, Mulgoa |
| West India | Kesar, Rajapuri, Pairi |
| East India | Himsagar, Kishenbhog, Jardalu |
| Hybrid varieties | Mallika (Neelum x Dasheri), Amrapali (Dasheri x Neelum), Arka Aruna, Arka Puneet |
Mallika vs Amrapali — Reciprocal Crosses
Mallika and Amrapali are reciprocal crosses between the same two parents -- Neelum and Dasheri -- but with the parents swapped as male and female. Mallika (Neelum x Dasheri) produces large, fibreless fruits with excellent flavour. Amrapali (Dasheri x Neelum) is a dwarf, regular-bearing variety that is the most suitable for high-density planting (HDP). Both were developed at IARI, New Delhi. In reciprocal crosses, the maternal parent influences fruit quality differently due to cytoplasmic inheritance.
Propagation
- Vegetative propagation is strongly preferred to maintain true-to-type characters -- seedling mangoes show enormous variation and take much longer to bear fruit
- Veneer grafting -- the most common commercial method currently; involves making a slanting cut on the rootstock and a matching cut on the scion
- Inarching (approach grafting) -- the traditional method where scion and rootstock are joined while both remain attached to their parent plants
- Stone grafting / Epicotyl grafting -- used especially during the rainy season when other methods have lower success rates; done on very young seedlings
- Rootstock: Seedlings of polyembryonic varieties (Olour, Vellaikolamban) are preferred because polyembryonic seeds produce genetically uniform nucellar seedlings
Planting
- Spacing: 10m x 10m (traditional) or 5m x 5m (high density planting)
- Pit size: 1m x 1m x 1m -- large pits are needed to accommodate the extensive root system
- Planting time: July-August (monsoon season) -- ensures adequate soil moisture for establishment
- High-density planting (HDP): Amrapali is the most suitable variety due to its naturally dwarf and compact growth habit
Manuring & Fertilization (per tree per year of age)
- 10 kg FYM + 100g N + 50g P2O5 + 100g K2O per year of age up to 10 years
- After 10 years: dose remains constant at the 10th year level (i.e., 100 kg FYM + 1 kg N + 500g P2O5 + 1 kg K2O)
- Apply in two split doses: June-July (after monsoon onset) and October
Irrigation
- Young plants: irrigate at 2-3 day intervals in summer for proper establishment
- Bearing trees: withhold irrigation 2-3 months before flowering -- this water stress is deliberate and helps initiate flower bud differentiation (the tree shifts from vegetative to reproductive mode)
- Resume irrigation after fruit set to support fruit development
Harvesting & Yield
- Starts bearing from 5-6 years (grafted); 8-10 years (seedling) -- grafting saves 3-5 years in coming to bearing
- Harvesting period: April-July depending on variety and region
- Maturity indices: shoulder development (filling of the cheek area), specific gravity < 1.0 (mature fruit floats in water), change in skin colour from dark green to light green
- Yield: 200-300 fruits/tree (grafted), 400-500 fruits/tree (old, well-maintained trees)
Post-Harvest
- Ripening with ethylene (100 ppm) or ethrel (ethephon) -- these are safe, approved ripening agents
- Use of calcium carbide for artificial ripening is banned under FSSAI because it contains traces of arsenic and phosphorus which are harmful to human health
- Wax coating extends shelf life by reducing moisture loss and respiration rate
- Storage temperature: 13 degrees C with 85-90% RH
Physiological Disorders
- Mango malformation -- affects both vegetative shoots (bunchy top) and floral panicles (compact masses of sterile flowers). Cause: fungus Fusarium mangiferae, possibly spread by the mango bud mite (Aceria mangiferae).
- Alternate/biennial bearing -- heavy crop one year ("on year"), very light crop the next ("off year"). This occurs because heavy fruiting depletes carbohydrate reserves, preventing flower bud initiation for the next season. Controlled by pruning, paclobutrazol application, and fruit thinning.
- Black tip -- caused by SO2 (sulphur dioxide) from brick kilns near mango orchards; the tip of the fruit turns black and necrotic. Controlled by borax spray at 0.6%.
- Spongy tissue -- internal breakdown of the mesocarp in Alphonso variety; the pulp becomes spongy and white. Exact cause is unknown (heat stress theory is most accepted).
- Fruit drop -- premature dropping of developing fruits; caused by hormonal imbalance. Controlled by spraying NAA (20 ppm) or 2,4-D (10 ppm) which are synthetic auxins that strengthen the fruit-stalk connection.
2. Banana (Musa spp.)
Banana (Musa spp.) — Source: Wikimedia Commons (CC)
- Family: Musaceae
- Origin: South-East Asia (Indo-Malayan region)
- Chromosome number: 2n = 22 (AA), 33 (AAB, ABB triploids) -- commercial bananas are mostly triploids, which makes them seedless (a natural form of parthenocarpy)
- India is the largest producer of banana in the world
NOTE
Commercial bananas are triploid (3 sets of chromosomes), which causes sterility and seedlessness. This is natural parthenocarpy -- fruits develop without fertilization. This is why you never find seeds in dessert bananas.
Climate & Soil
- Tropical climate; temperature 20-35 degrees C; rainfall 1000-2000 mm
- Cannot tolerate frost, drought, or waterlogging -- banana is quite sensitive to environmental extremes
- Rich loamy soil with good drainage; pH 6.5-7.5
Important Varieties
| Genomic Group | Varieties | Use |
|---|---|---|
| AAA | Grand Naine (G-9), Robusta, Dwarf Cavendish | Table/dessert |
| AAB | Rasthali, Poovan, Nendran, Mysore | Cooking/table |
| ABB | Monthan, Karpuravalli | Cooking |
| AB | Ney Poovan | Table |
Understanding Banana Genomic Groups
Banana varieties are classified by their genomic constitution based on contributions from two wild species: Musa acuminata (genome A -- sweet, dessert quality) and Musa balbisiana (genome B -- starchy, cooking quality). AAA varieties (all A genomes) are sweet dessert bananas. AAB varieties have more sweetness with some cooking quality. ABB varieties are primarily used for cooking (like plantains). The Grand Naine (G-9) is the most widely grown commercial variety worldwide and in India.
Propagation
- Suckers -- two types: sword suckers (narrow leaves, well-developed rhizome -- preferred for planting) and water suckers (broad leaves, poorly developed rhizome -- not recommended)
- Tissue culture plantlets -- uniform, disease-free, most recommended commercially for large-scale plantations. Tissue culture ensures freedom from viral diseases and produces genetically identical plants.
- Corm bits can also be used for propagation
Planting
- Spacing: 1.8m x 1.8m (conventional); 1.5m x 1.5m (high density)
- Pit size: 45cm x 45cm x 45cm
- Planting time: June-July (main season), October-November (late)
- Desuckering: retain only one follower sucker per plant -- extra suckers compete for nutrients and reduce bunch weight
Manuring (per plant)
- 10 kg FYM + 200g N + 60g P2O5 + 300g K2O
- N and K applied in 4-5 split doses because banana has a shallow root system and cannot access deep soil nutrients
- Banana is a heavy feeder of potassium -- K is essential for bunch development, fruit quality, and disease resistance
IMPORTANT
Banana requires the highest potassium among fruit crops (300g K2O per plant). Potassium improves fruit size, sugar content, and resistance to Panama wilt. Remember: banana is a "K-loving" crop.
Special Practices
- Propping -- supporting the plant with bamboo poles to prevent toppling under the weight of the heavy fruit bunch, especially during wind
- Denavelling -- removal of the male bud (the hanging bell-shaped structure) after the last hand of female flowers has set fruit. This redirects nutrients to developing fruits.
- Bunch covering -- wrapping the bunch with perforated polythene bags to improve fruit appearance, protect from pests and sunburn, and promote uniform ripening
- Earthing up -- mounding soil around the plant base for better anchorage and root development
Harvesting & Yield
- Duration: 11-14 months from planting to harvest
- Maturity indicators: ridges on fingers (individual banana fruits) become round (filling up), colour changes from dark green to light green
- Yield: 25-40 tonnes/ha
- Ripening: ethylene gas (100 ppm for 24 hrs at 15-20 degrees C) or traditional smoking method using burning of banana leaves or kerosene
Important Diseases
- Panama wilt (Fusarium oxysporum f.sp. cubense) -- a devastating soil-borne disease; the fungus persists in soil for decades. Race TR4 (Tropical Race 4) is currently the biggest threat to global banana production, as it affects the Cavendish group (Grand Naine, Robusta).
- Sigatoka leaf spot -- two forms: Yellow Sigatoka (M. musicola) and Black Sigatoka (M. fijiensis). Black Sigatoka is more severe and can reduce yield by 50%.
- Bunchy top virus -- transmitted by the banana aphid (Pentalonia nigronervosa); infected plants show dark green, narrow, bunched leaves with wavy margins. There is no cure; infected plants must be destroyed.
4. Guava (Psidium guajava)
Guava (Psidium guajava) — Source: Wikimedia Commons (CC)
- Family: Myrtaceae
- Origin: Tropical America (Mexico to Peru)
- Chromosome number: 2n = 22
- Known as the "Apple of the Tropics" due to its wide adaptability and apple-like shape
- Richest source of Vitamin C among common fruits -- 260 mg/100g in the variety Lucknow-49 (second only to Aonla among Indian fruits)
Climate & Soil
- Hardy tropical fruit; withstands a wide temperature range of 15-45 degrees C
- Tolerant of drought and moderate salinity -- guava is one of the hardiest fruit trees
- Grows in a wide range of soils; pH 4.5-8.2 (extremely adaptable)
- Well-drained sandy loam preferred for best results
Important Varieties
| Category | Varieties |
|---|---|
| White-fleshed | Lucknow-49 (Sardar), Allahabad Safeda, Seedless |
| Pink/Red-fleshed | Lalit, Arka Mridula, Arka Kiran, Apple Colour |
| Hybrid | Safed Jam, Arka Amulya |
Propagation
- Air layering (gooti) -- the most common traditional method; a branch is girdled, wrapped with moist sphagnum moss, and roots develop at the girdle point
- Wedge grafting or veneer grafting on seedling rootstock -- increasingly used for commercial nurseries
- Stooling -- used for rootstock production
Planting
- Spacing: 6m x 6m (conventional); 3m x 3m (meadow orcharding)
- Meadow orcharding -- an ultra high-density system developed for guava where trees are kept at just 1m height by annual pruning after harvest. This allows much higher tree density and easier harvesting. It is one of the most innovative fruit production systems in India.
- Two crop seasons:
- Ambe bahar (summer crop -- fruits ripen May-July)
- Mrig bahar (winter crop -- fruits ripen Nov-Feb) -- preferred for quality because cooler temperatures during fruit development produce sweeter, firmer fruits with better shelf life
Manuring (bearing tree)
- 260g N + 320g P2O5 + 260g K2O + 25 kg FYM per tree per year
Harvesting & Yield
- Climacteric fruit -- continues ripening after harvest
- Harvesting stage: when fruit turns yellowish-green (colour break stage)
- Yield: 25-30 t/ha (conventional); up to 50 t/ha (high density/meadow orcharding)
Guava Wilt
- The most devastating disease of guava; caused by Fusarium oxysporum f.sp. psidii and Macrophomina phaseolina (often a complex of both fungi)
- No effective chemical control exists, making prevention critical
- Management: use resistant rootstock (Psidium molle -- Chinese guava), soil drenching with carbendazim, bio-agents (Trichoderma viride), and avoiding waterlogged conditions
WARNING
Guava wilt has no effective chemical cure once established. The disease can kill entire orchards. Using resistant rootstock (Psidium molle) and Trichoderma-based biocontrol are the only reliable management strategies.
5. Papaya (Carica papaya)
Papaya (Carica papaya) — Source: Wikimedia Commons (CC)
- Family: Caricaceae
- Origin: Tropical America (Mexico, Central America)
- Chromosome number: 2n = 18
- Dioecious plant -- exists in three sex types: male (staminate), female (pistillate), and hermaphrodite (bisexual). Hermaphrodite plants are commercially preferred because they are self-fertile and produce well-shaped, symmetrical fruits.
Climate & Soil
- Strictly tropical; 22-26 degrees C optimal; killed by frost even at temperatures slightly below 0 degrees C
- Cannot tolerate waterlogging -- papaya is extremely susceptible to root rot in waterlogged conditions
- Well-drained sandy loam; pH 6.0-7.0
Important Varieties
- Gynodioecious varieties (commercially preferred -- produce female and hermaphrodite plants, no males): Pusa Delicious, Pusa Majesty, Pusa Dwarf, Pusa Nanha
- Dioecious varieties (produce separate male and female plants): Co-1, Co-2, Coorg Honey Dew, Washington, Pusa Giant
- Red Lady (Taiwan hybrid) -- the most popular commercial variety in India currently; produces large fruits with red-orange flesh and excellent flavour
Gynodioecious vs Dioecious Papaya — Why It Matters
In dioecious papaya, about 50% of seedlings are male (non-fruiting), which is wasteful. Farmers must wait until flowering to identify and remove male plants. In gynodioecious varieties, about 2/3 of plants are hermaphrodite and 1/3 are female -- there are no male plants. Hermaphrodite plants are preferred because they produce elongated, pear-shaped fruits ideal for marketing. This is why gynodioecious varieties save time, space, and resources.
Propagation
- Seeds -- the primary method of propagation
- Sow 3 seeds per pit; thin to one hermaphrodite plant after flowering (when sex can be identified -- hermaphrodite flowers have both stamens and pistil)
- In gynodioecious varieties: 2/3 plants will be hermaphrodite, making sex selection easier
Planting
- Spacing: 1.8m x 1.8m (most common)
- Pit size: 60cm x 60cm x 60cm
- Planting: June-July or September-October
Manuring (per plant per year)
- 250g N + 250g P2O5 + 500g K2O + 20 kg FYM
Harvesting & Yield
- Fruits appear in 9-10 months from planting -- this fast fruiting makes papaya one of the quickest-return fruit crops
- Climacteric fruit; harvest when 1/4 yellow streaks appear on skin (for distant markets) or at half-yellow stage (for local markets)
- Yield: 75-100 tonnes/ha -- one of the highest-yielding fruit crops
- Papain -- a proteolytic enzyme extracted from the latex of unripe fruits; commercially valuable, used in meat tenderizing, medicine (digestive enzyme), brewing, and textile industries
- Economic life: 3-4 years only, after which productivity declines and the tree becomes too tall for harvesting
Important Diseases
- Papaya ring spot virus (PRSV) -- transmitted by aphids (several species); causes yellow mosaic rings on fruit surface and mosaic patterns on leaves. Most devastating viral disease of papaya.
- Papaya leaf curl virus -- transmitted by whitefly
- Foot rot / Stem rot -- caused by Phytophthora palmivora; waterlogging is the primary predisposing factor. Proper drainage is the best preventive measure.
Summary Cheat Sheet
| Concept / Topic | Key Details / Explanation |
|---|---|
| Mango — family & origin | Anacardiaceae; Origin: Indo-Burma region; 2n = 40; National fruit of India |
| Mango — inflorescence | Panicle (mixed — both male + hermaphrodite flowers); entomophilous (insect-pollinated) |
| Mango — key varieties | Alphonso (Ratnagiri), Dashehari (Lucknow), Langra (Varanasi), Totapuri (for processing), Amrapali (IARI hybrid — Dashehari × Neelum) |
| Mango — disorders | Alternate/biennial bearing — controlled by Paclobutrazol; Spongy tissue — in Alphonso; Mango malformation — caused by Fusarium mangiferae |
| Mango — propagation | Veneer grafting (most common); also approach grafting (inarching) |
| Mango — production | India is world's largest producer; UP leads in India; largest area under mango among all fruits |
| Banana — family & origin | Musaceae; Origin: South-East Asia; 2n = 22 (AA), 33 (AAB/ABB triploid) |
| Banana — parthenocarpy | Naturally parthenocarpic — fruits develop without pollination/fertilization |
| Banana — propagation | Sword suckers (preferred) and tissue culture; NOT water suckers |
| Banana — key varieties | Grand Naine (Cavendish, export quality), Robusta, Dwarf Cavendish, Poovan (Mysore), Nendran (cooking) |
| Banana — production | India is world's largest producer; Tamil Nadu & Gujarat lead |
| Banana — disorders | Bunchy top virus (aphid-transmitted), Panama wilt (Fusarium oxysporum f.sp. cubense), Sigatoka leaf spot |
| Guava — family & origin | Myrtaceae; Origin: Tropical America; 2n = 22; "Apple of the Tropics" |
| Guava — Vitamin C | 260 mg/100g — 2nd richest after Aonla among Indian fruits |
| Guava — propagation | Air layering most common; also wedge/cleft grafting |
| Guava — key varieties | Allahabad Safeda (best quality), Lucknow-49 (Sardar) (highest yield), Arka Kiran (pink flesh) |
| Guava — bahar treatment | Withholding irrigation to regulate flowering; Mrig bahar (rainy season crop) preferred |
| Papaya — family & origin | Caricaceae; Origin: Tropical America (Mexico); 2n = 18; polygamous (male, female, hermaphrodite) |
| Papaya — sex types | Gynodioecious varieties preferred (2/3 hermaphrodite); Pusa Delicious, Pusa Majesty |
| Papaya — papain | Proteolytic enzyme from unripe fruit latex; used in meat tenderizing |
| Papaya — production | Fruits in 9-10 months; yield 75-100 t/ha; economic life 3-4 years |
| Papaya — diseases | PRSV (aphid-transmitted) — most devastating; Foot rot by Phytophthora palmivora |
| Climacteric fruits | Mango, Banana, Guava, Papaya — ripen after harvest |
| Non-climacteric fruits | Citrus, Grapes, Litchi, Pomegranate — do NOT ripen after harvest |
| Polyembryony | Mango, Citrus — multiple embryos from single seed (nucellar embryony) |
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