Agriculture - Mock Test 28

Question 271

Black scale insect of citrus is controlled by?

A) Metaphycus loundsbury B) Rodolia cardinalis C) Both of them D) None of them

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Question 272

Bio-types of brown plant hopper are of?

A) 2 types B) 3 types C) 4 types D) 5 types

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Question 273

Berlese's theory was proposed to explain the orign of?

A) Egg stage B) Larval stage C) Pupal stage D) Abdult stage

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Question 274

Basic unit of classification is known?

A) Species B) Genus C) Family D) Order

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Question 275

Wingless hexapod with 6 abdominal segments?

A) Diplura B) hysanura C) Collembolad D) Protura

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Question 276

Bacillus thuringiensis is most effective at pH?

A) 3 to 6 B) 9 to 10 C) 11 to 14 D) All of the above

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Question 277

Bacillus thurigiensis was reported by Berliner from?

A) Tribolium B) Heliothis C) Ephestia D) Spodoptera

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Question 278

Alxillary sclerites are absent in?

A) Lepidoptera B) Coleoptera C) Odonata D) Distyoptera

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Question 279

Archnids and insects contain malpighian tubules as organs of?

A) Respiration B) Excretion C) Digestion D) Secretion

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Question 280

Aphelinus mali has been a successful parasite in controlling?

A) Tobacco caterpiller B) Apple wolly aphis C) Maize stem borer D) Sugarcane top borer

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