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Study Point > Control Mechanism Of Pests > Flashcards

Control Mechanism Of Pests Flashcards

1
Q

Under good conditions the duration of the development cycle from egg to adult is ___________ days for beetles and ___________ days for moths

A

18-25 , 28-35

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2
Q

Major factors affecting population growth of most insect species are

A

Temperature
Relative humidity
And Moisture content

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3
Q

High moisture content, More than ________ percent renders food grains soft and susceptible to attack

A

16

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4
Q

Species breeds rapidly even in driest conditions are…

A

Trogoderma granarium

Tribolium spp

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5
Q

The optimum conditions of temperature and relative humidity (RH) for the rapid growth and multiplication of stored grain insect pets range from ________ and __________respectively

A

25-35 degree Celsius

60-65 %

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6
Q

When the insect population reaches a certain density, their metabolic activities release more heat than can be dissipated, In localised areas where the insect population is extremely dense the temperature may reach _______ degree Celsius Associated micro-organisms, mainly _______ may raise this to nearly _______degree Celsius causing extensive spoilage and occasionally , ____________

A

45
Fungi
75
Spontaneous combustion.

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7
Q

Temperature below ______ degree and above ______ degree retards growth and development , Heating of grains to ________ degree Celsius for __________ min kills almost all pests

A

15
42

50-60

10-20

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8
Q

Oxygen level <__________% is lethal to all insect pests

A

1

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9
Q

Use of low O2 _______ % and high CO2 ________ % is lethal to all insects

A

2-4

9-9.5

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10
Q

Bio agents are

A

Bt

Parasitoids

Predators

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11
Q

Grain protectants are

A

Pyrethrum dust or 5% malathion at 250g/100kg of seed

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12
Q

Fumigants are

A

Aluminium phosphide
Ethylene Bromide
Ethylene dichloride/carbon tetrachloride mixture

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13
Q

Prophylactic treatment at storage depots in FCI , Chemicals are

A

Malathion 50% EC

Deltamethrin 2.5 % WP

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14
Q

Generally ______ % of the stocks to be treated during the month are treated with Deltamethrin 2.5 % WP and remaining ______% stock is treated with Malathion 50% EC

A

80 , 20

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15
Q

______ is used to control surface infestation, crawling infestation and cross infestation of stored grain pests by air charging which acts as contact pesticide as well as fumigant when the space is airtight after spray

A

DDVP

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16
Q

In case DDVP is not available, air charging can be done with ________

A

Malathion 50% EC

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17
Q

Dilution of Malathion is

A

1:100

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18
Q

Dilution ratio of Deltamethrin 2.5% WP is

A

40gm/L

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19
Q

Dilution Ratio of DDVP is

A

1:150

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20
Q

Doses with diluted solution of Malathion 50% EC, Deltamethrin 2.5% WP and DDVP 76% EC is

A

3 L per 100 m2

3 L per 100 m2

3 L per 100 m2

21
Q

Periodicity of Malathion 50 % EC is

A

15 days

(21 days in winter)

22
Q

Periodicity of Deltamethrin 2.5 WP is

A

90 days

(3 months)

23
Q

Periodicity of DDVP 76% EC is

A

As and When required

(Use banned w.e.f
31-12-2020)

24
Q

Floor area of stack for rail fed godown and Raod fed godown is

A

9.15 m * 6.1 m =56 m2

9.15 m * 6.1 m =56 m2

25
Q

Volume of stack in Rail fed godowns and road fed godown are

A

9.15 m * 6.1 m * 4 m =223 m3

9.15 m * 6.1 m * 4 m =223 m3

26
Q

Floor area of one chamber of Rail-fed Godown and Road-fed Godown is

A

41.23 m * 21.34 m = 880 m2

41.23 m * 21.34 m = 880 m2

27
Q

Height of rail-fed godown and road-fed godown are

A

6.35m , 5.60m

28
Q

Total wall Area of Rail-fed and road-fed godown are

A

872 , 778 metre square

29
Q

Platform length of Rail-fed godown and road-fed godowns are

30
Q

Platform width of Rail-fed and road-fed godown is

A

3.05 m , 2.45 m

31
Q

Triangular area height of rail-fed and road-fed godowns

32
Q

Shed volume of rail-fed godown and road-fed godown is

A

7184 m cube and 6524 m cube

33
Q

IUPAC name of DDVP is

A

2,2-Dichlorovinyl dimethyl phosphate

34
Q

Chemical formula of DDVP

A

C4H7 CL2O4P

35
Q

Chemical formula for Deltamethrin

A

C22H19BR2NO3

36
Q

Chemical formula of Malathion is

A

C10H19O6PS2

37
Q

Dose of air-charging is

A

270 meter cube/ Liter prepared (diluted ) solution

38
Q

Highly effective fumigant which depletes the ozone in the atmosphere, so not used commonly

A

methyl bromide

39
Q

What type of gases release during fumigation with aluminium Phosphide(ALP)

A

Phosphine gas

Carbon dioxide

Ammonia

40
Q

Aluminium phosphide (ALP) ,each tablet is of how much gram

41
Q

Aluminium phosphide (ALP) doses for covered godown is

42
Q

Aluminium phosphide (ALP) doses for CAP storage is

A

9 Gms/MT + 20% extra dose

43
Q

Aluminium phosphide (AlP) dosages for shed fumigation

A

63 Gms/28 meter cube

44
Q

Aluminium phosphide(ALP) dosages for Khapra beetle (Trogoderma granarium ) infestation is

A

9 Gms/MT + 50% extra dose

45
Q

Insecticides Act year of formation is

46
Q

Insecticides Rules year of formation is

47
Q

Toxicity class of insecticides are

A

Extremely Toxic
Highly Toxic
Moderately Toxic
Slightly Toxic

48
Q

LD50 values of

Extremely toxic,
Highly Toxic,
Moderately Toxic
Slightly Toxic

insecticide are

A

<50

51-500

501-5000

> 5000

49
Q

Upper half mark of insecticide according to its toxicity class

Extremely toxic

Highly toxic

Moderately toxic

Slightly Toxic

A

POISON with SKULL mark (RED)

POISON (YELLOW)

DANGER (BLUE)

CAUTION (GREEN)

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