1. Rose belongs to which botanical family?
A. Malvaceae
B. Rosaceae
C. Solanaceae
D. Fabaceae
Answer: B
Rationale: Roses are members of the family Rosaceae.
2. The basic chromosome number of rose is:
A. x = 5
B. x = 7
C. x = 9
D. x = 12
Answer: B
Rationale: Roses have a basic chromosome number of 7.
3. Which Rosa species is widely used as a rootstock?
A. Rosa indica
B. Rosa chinensis
C. Rosa bourboniana
D. Rosa canina
Answer: D
Rationale: Rosa canina is commonly used as a rootstock.
4. Roses are commercially propagated mainly by:
A. Seeds
B. Layering
C. Budding
D. Tissue culture only
Answer: C
Rationale: T-budding is the standard commercial method.
5. The most common budding method in rose is:
A. Patch budding
B. Chip budding
C. T-budding
D. Ring budding
Answer: C
Rationale: T-budding gives high success in roses.
6. Ideal temperature for quality rose production is:
A. 10–15°C
B. 15–25°C
C. 25–35°C
D. Above 35°C
Answer: B
Rationale: Moderate temperatures favor bud formation and color.
7. Roses prefer which soil type?
A. Heavy clay
B. Sandy soil
C. Well-drained loam
D. Waterlogged soil
Answer: C
Rationale: Well-drained loamy soils ensure healthy roots.
8. Optimum soil pH for rose cultivation is:
A. 4.0–4.5
B. 5.0–5.5
C. 6.0–6.5
D. 7.5–8.0
Answer: C
Rationale: Slightly acidic soils are ideal.
9. Roses are generally classified as:
A. Annuals
B. Biennials
C. Perennials
D. Ephemerals
Answer: C
Rationale: Roses are perennial shrubs.
10. The economic part of rose used in perfumery is:
A. Leaf
B. Petal
C. Stem
D. Root
Answer: B
Rationale: Petals are used to extract rose oil and water.
11. Rose oil is mainly extracted from:
A. Rosa chinensis
B. Rosa damascena
C. Rosa indica
D. Rosa gallica
Answer: B
Rationale: R. damascena is the chief oil-bearing rose.
12. The major rose oil–producing country is:
A. India
B. France
C. Bulgaria
D. China
Answer: C
Rationale: Bulgaria is a global leader in rose oil.
13. The inflorescence in rose is usually:
A. Spike
B. Panicle
C. Solitary or corymb
D. Capitulum
Answer: C
Rationale: Flowers are solitary or in small clusters.
14. Roses are pruned mainly to:
A. Increase plant height
B. Control pests
C. Induce new flowering shoots
D. Reduce irrigation
Answer: C
Rationale: Pruning stimulates fresh flowering growth.
15. The best season for pruning roses in plains of India is:
A. June–July
B. August–September
C. October–November
D. January–February
Answer: C
Rationale: Post-monsoon pruning promotes winter flowering.
16. Dead heading in roses means:
A. Removing diseased plants
B. Removing old roots
C. Removing spent flowers
D. Removing leaves
Answer: C
Rationale: Dead heading encourages continuous blooming.
17. The pigment responsible for red color in roses is:
A. Carotene
B. Chlorophyll
C. Anthocyanin
D. Xanthophyll
Answer: C
Rationale: Anthocyanins impart red and pink colors.
18. Black spot disease of rose is caused by:
A. Alternaria spp.
B. Diplocarpon rosae
C. Fusarium spp.
D. Colletotrichum spp.
Answer: B
Rationale: D. rosae causes black spot.
19. Powdery mildew in rose is caused by:
A. Oidium spp.
B. Puccinia spp.
C. Albugo spp.
D. Phytophthora spp.
Answer: A
Rationale: Powdery mildew fungi infect leaves and buds.
20. Major insect pest of rose is:
A. Thrips
B. Stem borer
C. White grub
D. Fruit fly
Answer: A
Rationale: Thrips damage buds and petals.
21. Aphids damage roses mainly by:
A. Leaf mining
B. Boring stems
C. Sucking sap
D. Cutting roots
Answer: C
Rationale: Aphids are sap-sucking pests.
22. Roses grown for cut flowers require:
A. Low nitrogen
B. Balanced nutrition
C. No fertilizers
D. Only organic manure
Answer: B
Rationale: Balanced NPK ensures long stems and quality blooms.
23. Excess nitrogen in roses results in:
A. Better flower color
B. More disease resistance
C. Excess vegetative growth
D. Early flowering
Answer: C
Rationale: Too much N favors leaves over flowers.
24. Boron deficiency in rose leads to:
A. Leaf chlorosis
B. Bud drop and poor flowering
C. Root rot
D. Stem cracking
Answer: B
Rationale: Boron is vital for bud development.
25. The recommended method of irrigation for roses is:
A. Flood irrigation
B. Sprinkler irrigation
C. Drip irrigation
D. Furrow irrigation
Answer: C
Rationale: Drip saves water and reduces diseases.
26. Roses are sensitive to:
A. Shade
B. Frost
C. Wind
D. Light rain
Answer: B
Rationale: Frost damages shoots and buds.
27. Roses require how many hours of sunlight daily?
A. 2–3 hours
B. 4–5 hours
C. 6–8 hours
D. 10–12 hours
Answer: C
Rationale: Adequate sunlight is essential for flowering.
28. The edible rose product used in beverages is:
A. Rose oil
B. Rose concrete
C. Gulkand
D. Rose wax
Answer: C
Rationale: Gulkand is made from rose petals.
29. The fruit of rose is called:
A. Drupe
B. Capsule
C. Hip
D. Berry
Answer: C
Rationale: Rose fruits are called hips.
30. Rose hips are rich in:
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Answer: C
Rationale: Rose hips are an excellent vitamin C source.
31. Which rose group is most suitable for cut flowers?
A. Polyantha
B. Floribunda
C. Hybrid tea
D. Miniature
Answer: C
Rationale: Hybrid tea roses have long stems and large blooms.
32. Floribunda roses are known for:
A. Single large flowers
B. Clustered blooms
C. Fragrance only
D. Thornless stems
Answer: B
Rationale: Floribundas bear flowers in clusters.
33. Miniature roses are mainly used for:
A. Cut flowers
B. Pot culture
C. Oil extraction
D. Rootstock
Answer: B
Rationale: Miniatures are ideal for pots and borders.
34. Rose plants are spaced wider mainly to:
A. Reduce fertilizer cost
B. Improve air circulation
C. Reduce irrigation
D. Increase plant height
Answer: B
Rationale: Good aeration reduces diseases.
35. The best time to harvest roses for cut flowers is:
A. Midday
B. Afternoon
C. Early morning
D. Night
Answer: C
Rationale: Early harvest ensures freshness and longevity.
36. Bud stage recommended for harvesting roses is:
A. Fully open
B. Tight bud
C. Half-open
D. Over-mature
Answer: B
Rationale: Tight buds open well after harvest.
37. Vase life of cut roses is improved by:
A. Warm water
B. Sugar solution
C. Saline water
D. Plain water only
Answer: B
Rationale: Sugars supply energy to cut flowers.
38. The practice of bending shoots in rose is done to:
A. Reduce height
B. Increase flowering shoots
C. Control pests
D. Improve fragrance
Answer: B
Rationale: Bending promotes basal shoot emergence.
39. Roses respond best to which micronutrient?
A. Zinc
B. Boron
C. Iron
D. Manganese
Answer: B
Rationale: Boron supports flowering and bud health.
40. The most common physiological disorder in roses is:
A. Sunscald
B. Blind shoots
C. Blossom end rot
D. Hollow stem
Answer: B
Rationale: Blind shoots fail to produce flowers.
41. Blind shoots are mainly due to:
A. Excess nitrogen
B. Low light and improper pruning
C. Waterlogging
D. Viral infection
Answer: B
Rationale: Poor light and pruning cause non-flowering shoots.
42. Rose plants are best trained as:
A. Bushes
B. Trees only
C. Climbers only
D. Creepers
Answer: A
Rationale: Bush form is common for garden and cut roses.
43. Climbers in roses are mainly used for:
A. Cut flower production
B. Oil extraction
C. Covering arches and walls
D. Pot culture
Answer: C
Rationale: Climbers are ornamental landscape plants.
44. Rose is commercially important mainly for:
A. Medicinal roots
B. Edible leaves
C. Cut flowers and perfumery
D. Timber
Answer: C
Rationale: Flowers drive the economic value.
45. Roses are classified as:
A. Short-day plants
B. Long-day plants
C. Day-neutral plants
D. Shade plants
Answer: C
Rationale: Most roses are day-neutral.
46. Rose cut flowers are graded mainly based on:
A. Leaf number
B. Stem length and bud size
C. Root length
D. Thorn number
Answer: B
Rationale: Market grading focuses on stem and bud quality.
47. The main advantage of greenhouse rose cultivation is:
A. Lower cost
B. Year-round production
C. No pests
D. No pruning needed
Answer: B
Rationale: Controlled environment enables year-round harvest.
48. The practice of disbudding in roses involves:
A. Removing roots
B. Removing side buds
C. Removing leaves
D. Removing flowers after bloom
Answer: B
Rationale: Disbudding improves flower size.
49. Roses are unsuitable for:
A. Well-drained soils
B. Slightly acidic soils
C. Waterlogged soils
D. Open sunny locations
Answer: C
Rationale: Waterlogging leads to root diseases.
50. The primary reason for pruning intensity variation among rose groups is:
A. Soil type
B. Climate only
C. Growth habit and flowering pattern
D. Fertilizer dose
Answer: C
Rationale: Different groups flower on different wood.
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