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81.

In the formation of cuticle which of the following layer is secreted first:

A.	Exocuticle	B.	Endocuticle
C.	Wax layer	D.	Cuticulin layer

82.

In the reduction of a pest population, the balance of the natural enemies is maintained in:

A.	Pest management	B.	Pest control
C.	Pest eradication	D.	None of these

83.

In which of the following insect the spiracles are absent?

A.	Cecidomyid larvae	B.	Chironomid larvae
C.	Mycetophilid larvae	D.	Psycodid larvae

84.

In which order females have no pupal stage but males have:

A.	Mellophaga	B.	Strepsiptera
C.	Epemeroptera	D.	Dictyoptera

85.

Which one of the following types of spraying is best done by manually operated knapsack sprayer having flat fan nozzle?

A.	High volume	B.	Low volume
C.	Ultra low volume	D.	Semi low volume

86.

Which one of the following truly diagnoses the infestation by the sorghum shoot fly?

A.	Formation of 'dead heart' in the early seedling stage of sorghum which can be easily pulled out	B.	Formation of 'dead heart' and a bunchy top during the later seedling stage of sorghum
C.	Formation of 'dead heart' which cannot be easily pulled out during the later seedling stage of sorghum	D.	Formation of silvery shoot during the early seedling stage of sorghum

87.

Indicate the correct sequence through which the following insecticide came into use:

A.	BHC, Rotenone, Malath ion and Lead arsenate	B.	Lead arsentate, Rotenone, BHC and Malathion
C.	BHC, Rotenone, Lead arsenate and Malathion	D.	Rotenone, BHC, Lead arsenate and Malathion

88.

Indicate, which represent the analogous group:

A.	Wings of butterfly and birds	B.	Fore leg of horse and arm of a man
C.	Fore wings of moth and fins of fishes	D.	Hind wings of butterfly and legs of birds

89.

Indiscriminate use of pesticides and cultivation of high yielding crop varieties often leads to:

A.	A minor disease or insect pest problem becoming serious threat	B.	Destruction of natural enemies of pests
C.	Appearance of pesticides resistant pest strains	D.	All of the above

90.

Inorganic salts are toxic to insects by:

A.	Contact	B.	Ingestion
C.	Both of the above	D.	Inhalation