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For students in search of
- Hydroponic Gardening
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Guides - Basics to Experts level
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Growing fruit and vegetables hydroponically
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Practical daily questions or queries of hydroponics lovers
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Current Hydroponics and Indoor Gardening Market Growth as well as Trends
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| 191. |
Which one of the following remedies is to be suggested in case of failure of a manuallyoperated sprayer to retain pressure? |
| A. |
Tightening of loose nuts and clamps and replacement of gaskets |
B. |
Tightening of the lid of the tank, replacement of the gasket, if necessary |
| C. |
Opening the nozzle and cleaning its various parts especially the orifice |
D. |
Straightening the plunger rod if found bent |
Answer: Option B
Explanation:
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| 192. |
Which one of the following sprayers could require the lowest volume of spray solution to cover a hectare of rice crop? |
| A. |
Power sprayer |
B. |
Foot sprayer |
| C. |
Knapsack sprayer |
D. |
Hand sprayer |
Answer: Option D
Explanation:
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| 193. |
Which one of the following statements correctly defines economic threshold level? |
| A. |
The pest population level at which control measures should be taken to prevent the pest population from reaching economic injury level |
B. |
The lowest pest population density that will cause economic damage |
| C. |
The optimum pest population density that will cause economic damage |
D. |
The pest population level at which application of pest control measures will be uneconomic |
Answer: Option A
Explanation:
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| 194. |
Which of the following statements correctly defines the "alternate host" of a pathogen/parasite? |
| A. |
A host on which a parasite attacks simultaneously with the main host |
B. |
A host, which grows in alternate season or year |
| C. |
One of the two kinds of hosts on which a parasitic fungus develops to complete its life cycle |
D. |
A host on which, the parasite does not attack in normal conditions |
Answer: Option C
Explanation:
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| 195. |
Which one of the following tissue is most suitable for tissue culture to produce virus free plants of potato? |
| A. |
Leaf tissue |
B. |
Pollen |
| C. |
Embryo-tissue |
D. |
Meristem tip tissue |
Answer: Option A
Explanation:
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| 196. |
Which shows the symbiotic relationship? |
| A. |
Rhizobium |
B. |
Azotobactor |
| C. |
Clostridium |
D. |
Nitrosomonas |
Answer: Option A
Explanation:
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| 197. |
Which was the first plant bacterial disese reported? |
| A. |
Angular leaf spot of cotton |
B. |
Citrus canker |
| C. |
Fire blight of apple |
D. |
Bacterial blight of tomato |
Answer: Option C
Explanation:
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| 198. |
Whip smut of sugarcane is caused by: |
| A. |
Ustilago nuda |
B. |
Ustilago hordei |
| C. |
Urocystis agrophri |
D. |
Ustilago sciteminae |
Answer: Option D
Explanation:
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| 199. |
White rust of crucifer is caused by: |
| A. |
Puccinia |
B. |
Albugo |
| C. |
Sclerospora |
D. |
Peronospora |
Answer: Option B
Explanation:
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| 200. |
Who for the first time discovered antibiotics? |
| A. |
Alexander Flemming |
B. |
Stanley |
| C. |
Anton de Bary |
D. |
Louis Pasteur |
Answer: Option A
Explanation:
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