Agriculture - Mock Test 227

Question 2261

Root rot of papaya could be controlled by application of?

A) Bordeaux mixture B) Dithane M-45 C) Benelate D) Calaxin

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Question 2262

Root parasite of bajra is?

A) Cuscuta B) Striga C) Orobanche D) Loranthus

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Question 2263

Who for the first time discovered antibiotics?

A) Alexander Flemming B) Stanley C) Anton de Bary D) Louis Pasteur

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Question 2264

White rust of crucifer is caused by?

A) Puccinia B) Albugo C) Sclerospora D) Peronospora

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Question 2265

Whip smut of sugarcane is caused by?

A) Ustilago nuda B) Ustilago hordei C) Urocystis agrophri D) Ustilago sciteminae

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Question 2266

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

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Question 2267

Which shows the symbiotic relationship?

A) Rhizobium B) Azotobactor C) Clostridium D) Nitrosomonas

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Question 2268

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

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Question 2269

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

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Question 2270

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

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