Rubber questions and answers
HORTICULTUR
Rubber
| S.N. | Question | Answer |
| 1. | Botanical name? | Hevea brusiliensis |
| 2. | Family? | Euphorbiaceae |
| 3. | climate Tropical climate with annual rainfall of? | 2000 – 4500 mm |
| 4. | Season for optimum cultivation is? | June – July |
| 5. | In world, consumption ratio of natural to synthetic rubber is? | 39:61 |
| 6. | Tapping is done in rubber for removal of? | Latex |
| 7. | India ranks 3rd in rubber production and 5th in area and ……..in productivity in the world? | Ist |
| 8. | Latex contain average dry matter? | 32% |
| 9. | A budded tree is considered as tappable when it attains a girth of 50 cm at a height of? | 125 cm from the bud union |
| 10. | National average yield? | 1-6 t/hac /year |
| 11. | Processed product of rubbur? | Sheet rubber (latex-acetic or formic acid) |
| 12. | Soil and is suited for cultivation. Minimum and maximum temperature should be ranged from 25 to 34°C with 80 % relative humidity is ideal for cultivation. Regions prone to heavy winds should be avoided? | deep and lateritic fertile soil |
| 13. | It requires with an acidic pH of 4.5 to 6.0 and highly deficient in? | Available phosphorous |
| 14. | Method of propagation Propagated by? | Green budding, brown budding and crown budding |
| 15. | In smoke house temperature is maintained? | 40-60 °C |
| 16. | Hybrid clone-RRII-105 occupy ….. area under rubber cultivation and It is the highest yielding in the word? | 80% |
| 17. | Major physiological disorder? | Brown blast /TPD (tapping panel dryness) |
| 18. | Tapping cut (tapping panel) should be at a slope of 30° in budded plants and? | 25° in seedling trees |
| 19. | India is IIIrd largest producer of rubber next to Thailand and Indonesia, sharing….. of global output? | 9% |
| 20. | Latex meter to measures of rubber this is known us? | Matrola |
| 21. | When about 70% of trees in plantation attain tappable girth? | Tapping is initiated |
| 22. | Best yield is obtained by tapping a depth of less than 1 mm close to? | Cambium |
| 23. | 70% of rubber is used in? | Tyres and tubes |
| 24. | In India, consumption ratio of natural to synthetic rubber is? | 80:20 |
| 25. | Rubber board is situated at? | Kottayam (Kerala) |
| 26. |
Pest of rubber plant? |
Scale insect, Mealy bug, Termite (White ant),Mite |
| 27. |
Diseases of rubber plant? |
Abnormal leaf fall, Powdery mildew, Bird’s eye spot |
| 28. | Rubber yield steeply increases year by year, reaching a peak after? | 14 years of planting |
| 29. | Yield In South India, the annual yield of rubber is 375 kg/ha from seedlings trees, whereas budded plants yield? | 800 – 1000 kg/ha |
“However difficult life may seem, there is always something you can do and succeed at.”
| Varieties | ||
| RFU-112.600.605, 703,513.625 | GT-I | RRII-105, 118, 203, 287 |
| PB-86, 206, 213, 217, 235 | PR-107 | TJR-1 |
“Striving for success without hard work is like trying to harvest where you haven’t planted.”
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