🥒 Cucurbit Vegetables — Cucumber, Bottle Gourd & More
Learn cucumber, bottle gourd, watermelon and pumpkin cultivation for CUET Agriculture. Cucurbitaceae, monoecious habit and sex expression.
Cucurbits belong to family Cucurbitaceae. All cucurbits produce pepo type fruit (a fleshy, indehiscent fruit with a hard rind). They are generally monoecious warm-season crops, with sex expression strongly influenced by temperature, day length, and plant growth regulators.
10. Cucumber (Cucumis sativus)
Cucumber (Cucumis sativus) — Source: Wikimedia Commons (CC)
- Family: Cucurbitaceae
- Origin: India (primary centre of origin -- Northern India)
- Chromosome number: 2n = 14
- Monoecious (both male and female flowers on the same plant)
- Sex expression is influenced by plant growth regulators and environmental factors -- this is a key concept for cucurbits
IMPORTANT
Cucumber originated in India (Northern India). This is important for CUET as students often confuse cucumber's origin. Among cucurbits, other crops originating in India include Pointed gourd, Sponge gourd, and Ivy gourd.
Climate & Soil
- Warm season crop; optimum 25-30 degrees C
- Frost-sensitive; seeds will not germinate below 15 degrees C
- Well-drained sandy loam to loam; pH 6.0-7.0
Important Varieties
- Slicing: Pusa Sanyog (gynoecious hybrid -- predominantly female flowers, leading to higher yield), Pusa Barkha, Poinsett
- Pickling: National Pickling, SMR-58
- Parthenocarpic: Pusa Seedless (for polyhouse cultivation -- produces fruit without pollination)
- Gynoecious lines: Pusa Sanyog (predominantly female flowers -- high yield because every flower can potentially set fruit)
Cultivation
- Direct sown crop
- Seed rate: 2-3 kg/ha
- Spacing: 1.5m x 60cm (with trailing on ground); 60cm x 45cm (staking/vertical growing)
- Season: February-March (summer); June-July (rainy)
- Apply silver nitrate (AgNO3) or ethephon to modify sex expression and increase female flowers
- GA3 promotes male flowers; Ethephon promotes female flowers -- this is a critical concept tested in CUET
Manuring
- 15 tonnes FYM + 80 kg N + 60 kg P2O5 + 60 kg K2O/ha
Harvesting & Yield
- Harvest when tender, immature, and green (before seeds harden and skin toughens)
- Yield: 10-15 tonnes/ha (open field); 60-80 tonnes/ha (polyhouse)
- Duration: first harvest 45-60 days after sowing
Major Problems
- Downy mildew (Pseudoperonospora cubensis) -- angular yellow spots on upper leaf surface with purplish mould on the underside
- Powdery mildew -- white powdery growth on leaf surfaces
- Cucumber mosaic virus -- transmitted by aphids; causes mosaic on leaves and fruit deformity
- Fruit fly (Bactrocera cucurbitae) -- maggots bore into fruits; the most damaging pest of cucurbits
- Control: cue-lure traps (pheromone traps), bait spray (malathion + jaggery)
11. Bottle Gourd (Lagenaria siceraria)
Bottle Gourd (Lagenaria siceraria) — Source: Wikimedia Commons (CC)
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Cucurbits belong to family Cucurbitaceae. All cucurbits produce pepo type fruit (a fleshy, indehiscent fruit with a hard rind). They are generally monoecious warm-season crops, with sex expression strongly influenced by temperature, day length, and plant growth regulators.
10. Cucumber (Cucumis sativus)
Cucumber (Cucumis sativus) — Source: Wikimedia Commons (CC)
- Family: Cucurbitaceae
- Origin: India (primary centre of origin -- Northern India)
- Chromosome number: 2n = 14
- Monoecious (both male and female flowers on the same plant)
- Sex expression is influenced by plant growth regulators and environmental factors -- this is a key concept for cucurbits
IMPORTANT
Cucumber originated in India (Northern India). This is important for CUET as students often confuse cucumber's origin. Among cucurbits, other crops originating in India include Pointed gourd, Sponge gourd, and Ivy gourd.
Climate & Soil
- Warm season crop; optimum 25-30 degrees C
- Frost-sensitive; seeds will not germinate below 15 degrees C
- Well-drained sandy loam to loam; pH 6.0-7.0
Important Varieties
- Slicing: Pusa Sanyog (gynoecious hybrid -- predominantly female flowers, leading to higher yield), Pusa Barkha, Poinsett
- Pickling: National Pickling, SMR-58
- Parthenocarpic: Pusa Seedless (for polyhouse cultivation -- produces fruit without pollination)
- Gynoecious lines: Pusa Sanyog (predominantly female flowers -- high yield because every flower can potentially set fruit)
Cultivation
- Direct sown crop
- Seed rate: 2-3 kg/ha
- Spacing: 1.5m x 60cm (with trailing on ground); 60cm x 45cm (staking/vertical growing)
- Season: February-March (summer); June-July (rainy)
- Apply silver nitrate (AgNO3) or ethephon to modify sex expression and increase female flowers
- GA3 promotes male flowers; Ethephon promotes female flowers -- this is a critical concept tested in CUET
Manuring
- 15 tonnes FYM + 80 kg N + 60 kg P2O5 + 60 kg K2O/ha
Harvesting & Yield
- Harvest when tender, immature, and green (before seeds harden and skin toughens)
- Yield: 10-15 tonnes/ha (open field); 60-80 tonnes/ha (polyhouse)
- Duration: first harvest 45-60 days after sowing
Major Problems
- Downy mildew (Pseudoperonospora cubensis) -- angular yellow spots on upper leaf surface with purplish mould on the underside
- Powdery mildew -- white powdery growth on leaf surfaces
- Cucumber mosaic virus -- transmitted by aphids; causes mosaic on leaves and fruit deformity
- Fruit fly (Bactrocera cucurbitae) -- maggots bore into fruits; the most damaging pest of cucurbits
- Control: cue-lure traps (pheromone traps), bait spray (malathion + jaggery)
11. Bottle Gourd (Lagenaria siceraria)
Bottle Gourd (Lagenaria siceraria) — Source: Wikimedia Commons (CC)
- Family: Cucurbitaceae
- Origin: Africa
- Chromosome number: 2n = 22
- Monoecious; flowers open in the evening (vespertine flowering -- night-blooming) -- this is unique among commonly cultivated cucurbits
- Pollinated by moths (unlike other cucurbits which are pollinated by bees during daytime)
- Used as rootstock for grafting watermelon to provide resistance against Fusarium wilt
TIP
Bottle gourd is the exception in cucurbits for flower opening time: its flowers open in the evening (vespertine) and are pollinated by moths, while all other cucurbits open flowers in the early morning and are pollinated by bees.
Climate & Soil
- Warm season; optimum 24-35 degrees C
- Cannot tolerate frost
- Sandy loam to clay loam; pH 6.0-7.0
Important Varieties
- Pusa Naveen, Pusa Meghdoot, Pusa Manjari, Pusa Hybrid-3
- Arka Bahar -- round-fruited, popular in South India
- Narendra Rashmi, Pusa Sandesh
Cultivation
- Direct sown on ridges or in pits
- Seed rate: 4-5 kg/ha
- Spacing: 3m x 1m (trailing on ground); 2m x 1m (staking/pandal system)
- Season: Summer -- January-March; Rainy -- June-July
- Pandal / Bower system -- an overhead training system where vines grow on a flat frame. This produces straight, clean fruits and reduces fruit rot from ground contact.
Manuring
- 20 tonnes FYM + 80 kg N + 60 kg P2O5 + 40 kg K2O/ha
Harvesting & Yield
- Harvest tender green fruits when skin can be dented by thumbnail (the "thumbnail test")
- Picking every 3-5 days
- Yield: 30-40 tonnes/ha
16. Cucurbits — Comprehensive Overview
Cucurbits belong to family Cucurbitaceae. The name "cucurbits" was given by Dr. Bailey. All cucurbits produce pepo type fruit. The common edible part is the fruit (flesh).
Master Table — Cucurbit Crops
| Crop | Scientific Name | 2n | Origin |
|---|---|---|---|
| Cucumber (Khira) | Cucumis sativus | 14 | India |
| Muskmelon (Kharbooja) | Cucumis melo | 24 | Tropical Africa |
| Long melon (Kakdi) | Cucumis melo var. utilissimus | 24 | Tropical Africa |
| Watermelon (Tarbooj) | Citrullus lanatus | 22 | Tropical Africa |
| Round melon (Tinda) | Citrullus lanatus var. fistulosus | 22 | Tropical Africa |
| Ridge gourd (Turai) | Luffa acutangula | 26 | Asia |
| Sponge gourd (Gilki) | Luffa cylindrica | 26 | India |
| Bitter gourd (Karela) | Momordica charantia | 22 | Indo-Burma |
| Bottle gourd (Lauki) | Lagenaria siceraria | 22 | South Africa & India |
| Pumpkin (Kaddu) | Cucurbita moschata | 40 | Mexico |
| Pointed gourd (Parwal) | Trichosanthes dioica | 22 | India |
| Ivy gourd (Tindora) | Coccinia indica | 24 | India |
Key Cucurbit Facts
- Progenitors (wild ancestors): Cucumber comes from Cucumis hardwickii; Watermelon from Citrullus colocynthis
- Life cycle: Generally annual; Exceptions -- Pointed gourd and Ivy gourd are perennial cucurbits
- Sex expression: Generally monoecious; first 1-7 nodes bear male flowers, then female flowers appear at higher nodes
- Male:female flower ratio in cucurbits: approximately 15:1
- Andromonoecious: Muskmelon (has both male and hermaphrodite flowers -- no separate female flowers)
- Endosperm: Absent in cucurbit seeds (non-endospermic -- food reserve stored in cotyledons)
- Flower opening time: Generally early morning; Bottle gourd opens in evening (vespertine)
Sex Modification in Cucurbits
| Treatment | Increases Male Flowers | Increases Female Flowers |
|---|---|---|
| Temperature | High temperature | Low temperature |
| Day length | Long days | Short days |
| GA3 | 1500-200 ppm | — |
| Ethephon/Ethylene | — | 250 ppm |
| AgNO3 | 200-300 ppm | — |
| MH spray | — | 50-150 ppm |
IMPORTANT
The key rule: GA3 = more male flowers; Ethephon = more female flowers. Also remember that high temperature + long days = maleness, while low temperature + short days = femaleness.
Nutritional Content
| Nutrient | Richest Cucurbit |
|---|---|
| Highest Vitamin A | Pumpkin (Arka Chandan) |
| Highest Vitamin C | Bitter gourd |
| Highest Iron (Fe) | Watermelon |
| Highest Copper (Cu) | Pointed gourd (Parwal) |
| Highest Chlorine (Cl) | Cucumber |
Key bitter/toxic compounds:
- Cucurbitacin -- the general bitter compound in cucurbits
- Serotonin -- toxic element found in watermelon
- Momordicin -- the specific bitter compound in bitter gourd
16a. Watermelon (Citrullus lanatus)
- 2n = 22; Origin: Tropical Africa
- Called "Mood Food" and "Food for 22nd Century"
- Seedless watermelon is triploid (3n = 33) -- produced by crossing a tetraploid (4n) female with a diploid (2n) male
- Ground spot -- where the fruit touches ground, turning yellow -- this is a maturity indicator
| Variety | Features |
|---|---|
| Durgapura Meetha | Early variety |
| Arka Jyoti | Sweetest (TSS 12-14 degrees Brix); cold-tolerant; Vitamin C rich |
| Pusa Bedana | Seedless; triploid (2n = 33); developed by Dr. Kishore |
| Sugar Baby (USA) | Sweetest small-fruited variety (TSS 11-13%) |
16b. Muskmelon (Cucumis melo)
- 2n = 24; Origin: Tropical Africa
- Called "Wholesome food" -- contains 90% water
- Andromonoecious plant (has both male and hermaphrodite flowers -- unique among cucurbits)
- Netting on fruit surface is a maturity indicator
- Slip stage -- the fruit naturally detaches from the vine at maturity
| Variety | Features |
|---|---|
| Arka Jeet | Sweetest variety (TSS 12-14 degrees B) |
| Pusa Sharbati | Most popular; highest market value |
| Arka Rajhans | Bacterial wilt resistant |
16c. Pumpkin (Cucurbita moschata)
- 2n = 40; Origin: Mexico
- Highest Vitamin A content among all cucurbits
- Arka Chandan has the highest Vitamin A content among all cucurbit varieties
16d. Ridge Gourd (Luffa acutangula)
- 2n = 26; Origin: Asia (India)
- Has prominent longitudinal ridges on the fruit surface
- Varieties: Pusa Nasdar, Pusa Nutan, Satputia (a unique hermaphrodite variety), Arka Sumit, Arka Sujat
16e. Bitter Gourd (Momordica charantia)
- 2n = 22; Origin: Indo-Burma
- Highest Vitamin C content among all cucurbits
- Contains Charatin (Momordicin) -- used in diabetes management (helps lower blood glucose)
16f. Pointed Gourd (Trichosanthes dioica)
- 2n = 22; Origin: India
- Dioecious plant (separate male and female plants) -- major exception among cucurbits
- Perennial crop -- another exception; propagated vegetatively by vine cuttings and root cuttings
- Highest Copper (Cu) content among all vegetables
- Called the "Exception" (Apvaad) among cucurbits -- both perennial and dioecious
TIP
Pointed gourd is the double exception in cucurbits: (1) dioecious (not monoecious), and (2) perennial (not annual). Ivy gourd is also perennial but monoecious.
Cucurbit Seed Rates and Spacing
| Crop | Seed Rate (kg/ha) | Spacing (Row x Plant) |
|---|---|---|
| Bottle gourd (Lauki) | 4-5 | 2.5-3.0 x 0.75 m |
| Pumpkin (Kaddu) | 4-5 | 3.5 x 1.25 m |
| Bitter gourd (Karela) | 4-5 | 1.25 x 0.50 m |
| Watermelon (Tarbooj) | 4-5 | 2.5 x 1.00 m |
| Muskmelon (Kharbooj) | 1.5-2.0 | 2.0 x 0.6 m |
| Ridge gourd (Turai) | 4-5 | 1.0 x 0.6 m |
| Cucumber (Khira) | 2-2.5 | 1.5 x 0.5 m |
| Long melon (Kakdi) | 2 | 2.5 x 0.56 m |
| Ivy gourd (Tindora) | 4.5 | 2.0 x 0.75 m |
Quick Comparison Table — Major Vegetable Crops
| Feature | Tomato | Brinjal | Chilli | Okra | Onion | Potato | Cauliflower | Cabbage | Peas | Cucumber | Bottle Gourd |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Family | Solanaceae | Solanaceae | Solanaceae | Malvaceae | Amaryllidaceae | Solanaceae | Brassicaceae | Brassicaceae | Fabaceae | Cucurbitaceae | Cucurbitaceae |
| Origin | Peru | India | Mexico | Africa | C. Asia | S. America | Mediterranean | Mediterranean | Mediterranean | India | Africa |
| 2n | 24 | 24 | 24 | 130 | 16 | 48 | 18 | 18 | 14 | 14 | 22 |
| Season | Both | Both | Both | Warm | Cool | Cool | Cool | Cool | Cool | Warm | Warm |
| Method | Transplant | Transplant | Transplant | Direct | Transplant | Tuber | Transplant | Transplant | Direct | Direct | Direct |
CUET Important Points to Remember
- Solanaceous vegetables (all 2n = 24 except potato 2n = 48): Tomato, Brinjal, Chilli, Potato
- Cole crops (all 2n = 18): Cauliflower, Cabbage, Broccoli, Knol-khol
- Cucurbits (monoecious): Cucumber, Bottle gourd, Pumpkin, Watermelon, Muskmelon, Ridge gourd, Bitter gourd
- Origin in India: Brinjal, Cucumber, Pointed gourd, Sponge gourd, Ivy gourd
- Vegetatively propagated: Potato (tubers), Onion (sets/bulbs), Garlic (cloves), Pointed gourd (vine cuttings)
- Lycopene -- Tomato; Capsaicin -- Chilli; Allyl propyl disulphide -- Onion; Solanine -- Potato (toxic); Allicin -- Garlic; Cucurbitacin -- Cucurbits; Momordicin/Charatin -- Bitter gourd
- Buttoning in cauliflower -- premature small curds due to stress
- Blanching in cauliflower -- covering curd with leaves to keep white
- YVMV in okra -- most important disease; transmitted by whitefly
- Fruit fly -- most important pest of cucurbits; controlled by cue-lure traps
- Gynoecious hybrids -- predominantly female flowers (Cucumber: Pusa Sanyog)
- Ethephon promotes femaleness in cucurbits; GA3 promotes maleness
- Potato -- Irish Famine (1845) was caused by late blight (Phytophthora infestans)
- Maleic Hydrazide (MH) -- sprout inhibitor for onion and garlic storage
- Diamond Back Moth (DBM) -- most destructive pest of cole crops worldwide
- Andromonoecious: Muskmelon (male + hermaphrodite flowers)
- Dioecious cucurbit: Pointed gourd (Trichosanthes dioica) -- exception
- Perennial cucurbits: Pointed gourd, Ivy gourd -- exceptions to annual cucurbit rule
- Vitamin A richest cucurbit: Pumpkin (Arka Chandan)
- Vitamin C richest cucurbit: Bitter gourd
- Seedless watermelon: Triploid (3n = 33); variety Pusa Bedana
- Carotene (Vitamin A): Carrot -- Pusa Kesar is first tropical variety
- Garlic -- does not produce true seed; propagated only by cloves
- Forking in carrot -- caused by hard/stony soil and calcium deficiency
- Pithiness in radish -- spongy hollow roots caused by late harvesting and high temperature
Summary Cheat Sheet
| Concept / Topic | Key Details / Explanation |
|---|---|
| Cucurbitaceae family | All produce pepo fruit; generally monoecious warm-season crops; named by Dr. Bailey |
| Cucumber — basics | Cucumis sativus; Origin: India; 2n = 14; monoecious |
| Cucumber — sex modification | GA₃ → more male flowers; Ethephon → more female flowers; high temp + long days = maleness |
| Cucumber — key variety | Pusa Sanyog — gynoecious hybrid (predominantly female flowers, high yield) |
| Cucumber — yield | Open field: 10-15 t/ha; Polyhouse: 60-80 t/ha |
| Bottle gourd — basics | Lagenaria siceraria; Origin: Africa; 2n = 22; vespertine flowering (evening); pollinated by moths |
| Bottle gourd — rootstock | Used as rootstock for watermelon grafting against Fusarium wilt |
| Bottle gourd — pandal system | Overhead training system producing straight, clean fruits; yield 30-40 t/ha |
| Fruit fly | Bactrocera cucurbitae — most damaging pest of cucurbits; control: cue-lure traps, bait spray |
| Cucurbit endosperm | Absent (non-endospermic); food stored in cotyledons |
| Male:female flower ratio | Approximately 15:1 in cucurbits |
| Andromonoecious cucurbit | Muskmelon (male + hermaphrodite flowers) |
| Dioecious cucurbit | Pointed gourd (Trichosanthes dioica) — exception |
| Perennial cucurbits | Pointed gourd and Ivy gourd — exceptions to annual rule |
| Watermelon — seedless | Triploid (3n = 33); variety Pusa Bedana; called "Mood Food" / "Food for 22nd Century" |
| Watermelon — maturity | Ground spot turning yellow is a maturity indicator |
| Muskmelon — maturity | Netting on surface and slip stage (fruit detaches from vine) |
| Pumpkin — nutrition | Highest Vitamin A among cucurbits; variety Arka Chandan |
| Bitter gourd — nutrition | Highest Vitamin C among cucurbits; contains Momordicin/Charatin for diabetes |
| Pointed gourd — unique | Dioecious + perennial; highest Copper (Cu); propagated vegetatively |
| Key chemical compounds | Lycopene (tomato), Capsaicin (chilli), Allyl propyl disulphide (onion), Solanine (potato), Allicin (garlic), Cucurbitacin (cucurbits) |
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