Cultivation Technique of Carnation
Unit 1: Cultivation of Commercial FlowerCrops-I
Textual Question-Answers
Check Your Progress
A. Fill in the Blanks
1. All the lateral buds below the terminal one are removed whenthey are 5–10 mm in diameter in ……………… method.
Ans: disbudding
2. A practice for quality carnation production is ………………Ans: pinching
3. Carnation is propagated by ………………Ans: cuttings
4. Carnation can be planted at ………………Ans: 20 × 20 cm spacing
5. Terminal cuttings of ……………… length with at least three nodes are used for propagation.
Ans: 10–15 cm
B. Multiple Choice Questions
1. Carnation yields ………………(a) 150–400 cut flowers/m²
(b) 300–500 cut flowers/m²
(c) 500–600 cut flowers/m²
(d) 600–700 cut flowers/m²
Ans: (b)
2. Carnation blue or Fancy (A) grade has ……………… stem length.
(a) 90–100 cm
(b) 60–70 cm
(c) 100–120 cm
(d) 120–150 cm
Ans: (a)
3. Red or Standard (B) grade carnation flowers have ………………stem length.
(a) 30–40 cm
(b) 40–50 cm
(c) 50–60 cm
(d) 60–70 cm
Ans: (d)
4. The Green or Short (C) grade flowers of carnation have……………… stem length.
(a) 30–40 cm
(b) 40–50 cm
(c) 50–60 cm
(d) 60–70 cm
Ans: (b)
C. Subjective Questions
1. How can carnations be propagated by cutting?
Ans: Carnations are propagated by terminal cuttings taken from healthymother plants. Cuttings with 3–4 nodes are planted in rooting media undersuitable temperature and humidity conditions.
2. What is pinching in carnation?
Ans: Pinching is the removal of the terminal growing tip to encouragelateral branching and increase the number of flowering shoots.
3. Give the causes and remedies for calyx splitting in carnation.
Ans: Calyx splitting is caused by nutritional imbalance, rapid growth, and varietal characters. It can be controlled by balanced fertilization, properirrigation, and use of calyx-supporting nets.
4. Describe the methods of harvesting in carnation.
Ans: Carnation flowers are harvested at the tight bud stage or when outerpetals show colour. Harvesting is done with sharp tools during cool hours.
5. What are the physiological disorders of carnation?
Ans: Physiological disorders of carnation include calyx splitting,
sleepiness, stem break, and flower malformation.
6. How is post-harvest care taken with harvested flowers?
Ans: Post-harvest care includes immediate placement of flowers in cleanwater, grading, precooling, and storage at low temperature to increase vase life.
7. Write about the grading of carnation flowers.
Ans: Carnation flowers are graded based on stem length, flower size, straightness, and quality into Fancy (A), Standard (B), and Short (C) grades.
D. Match the Columns
Ans:
1. Calyx splitting — (c) Nutritional imbalance
2. Curly tip — (e) Low light and low temperature
3. Bacterial leaf spot — (a) Pseudomonas woodsii
4. Flower bud diseases — (b) Alternaria dianthicola
5. Carnation tortrix moth — (d) Tortrix pronubata
