Management of Nematodes
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Question No. 1
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Which chemical is a fumigant used for nematode control?
A.
Aldicarb
B.
Carbofuran
C.
Methyl bromide
D.
Thionazin
Question No. 2
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What is a common non-fumigant nematicide?
A.
DD
B.
EDB
C.
Carbofuran
D.
MBr
Question No. 3
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Which of the following is a carbamate nematicide?
A.
Phorate
B.
Aldicarb
C.
Phenamiphos
D.
Thionazin
Question No. 4
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What type of nematicide is Phorate?
A.
Carbamate
B.
Organophosphate
C.
Fumigant
D.
Biological
Question No. 5
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Which physical method is used for nematode control?
A.
Crop rotation
B.
Flooding
C.
Hot water treatment
D.
Biological control
Question No. 6
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What is the temperature and duration for hot water treatment of nematodes?
A.
45°C for 5 min
B.
50°C for 10 min
C.
54°C for 10-15 min
D.
60°C for 20 min
Question No. 7
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What is an example of a regulatory method for nematode management?
A.
Soil solarization
B.
Crop rotation
C.
Quarantine regulations
D.
Biological control
Question No. 8
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Which fungus is known for its potential in biological control of nematodes?
A.
Pus/curia penetrans
B.
Trichoderma harzianum
C.
Paecilomyces lilacinus
D.
Beauveria bassiana
Question No. 9
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Which bacteria is a larval parasite of nematodes?
A.
Bacillus thuringiensis
B.
Pseudomonas fluorescens
C.
Pus/curia penetrans
D.
Rhizobium spp.
Question No. 10
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What is the primary benefit of crop rotation in nematode control?
A.
Reduces nematode population
B.
Increases soil fertility
C.
Improves water drainage
D.
Enhances beneficial insect activity
Question No. 11
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Which crop is known to contain allyl isothiocyanate, toxic to cyst nematodes?
A.
Marigold
B.
Mustard
C.
Gram
D.
Potato
Question No. 12
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What compound does Marigold contain that reduces nematode populations?
A.
Allyl isothiocyanate
B.
α-terthienyl
C.
Carbofuran
D.
Aldicarb
Question No. 13
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How does flooding help in nematode control?
A.
Increases soil temperature
B.
Reduces soil moisture
C.
Kills nematodes by asphyxiation
D.
Enhances root growth
Question No. 14
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What is an important practice for preventing nematode infestation?
A.
Using healthy planting material
B.
Applying excess fertilizer
C.
Practicing monoculture
D.
Ignoring crop rotation
Question No. 15
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What method involves using plastic sheets to trap solar heat for nematode control?
A.
Soil solarization
B.
Crop rotation
C.
Flooding
D.
Fumigation
Question No. 16
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Which method is effective against Molya disease?
A.
Soil solarization
B.
Crop rotation with mustard and gram
C.
Flooding
D.
Hot water treatment
Question No. 17
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Which of these is NOT a chemical control method for nematodes?
A.
Fumigation
B.
Biological control
C.
Carbamates
D.
Organophosphates
Question No. 18
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What does DBCP stand for?
A.
Dibromochloropropane
B.
Dichlorobromopropane
C.
Dibromochloropropene
D.
Dichlorobromopropene
Question No. 19
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Which of the following is a non-fumigant nematicide?
A.
Methyl bromide
B.
Ethylene dibromide (EDB)
C.
Carbofuran
D.
DD
Question No. 20
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Which of the following is an organophosphate nematicide?
A.
Aldicarb
B.
Carbofuran
C.
Phenamiphos
D.
Oxamyl
Question No. 21
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What is the mode of action of fumigant nematicides?
A.
Inhibit nematode reproduction
B.
Paralyze nematode nervous system
C.
Kill nematodes by creating a toxic environment
D.
Enhance plant resistance to nematodes
Question No. 22
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How do non-fumigant nematicides generally work?
A.
By killing nematodes directly
B.
By stimulating plant growth
C.
By inhibiting nematode feeding or movement
D.
By disrupting nematode egg hatching
Question No. 23
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Which of the following is an example of a nematode-antagonistic crop?
A.
Rice
B.
Wheat
C.
Marigold
D.
Sugarcane
Question No. 24
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What is the role of trap crops in nematode management?
A.
To attract and kill nematodes
B.
To repel nematodes
C.
To provide nutrients for beneficial microbes
D.
To improve soil structure
Question No. 25
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Which cultural practice can help reduce nematode populations in the soil?
A.
Applying excessive nitrogen fertilizer
B.
Planting susceptible crops repeatedly
C.
Leaving crop residues in the field
D.
Summer fallowing and soil solarization
Question No. 26
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What is the primary advantage of biological control methods for nematodes?
A.
They are highly effective and fast-acting
B.
They are environmentally friendly and sustainable
C.
They are cheaper than chemical control
D.
They can eradicate nematode populations completely
Question No. 27
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What is a potential disadvantage of using chemical nematicides?
A.
They are always effective against all nematode species
B.
They can have negative impacts on non-target organisms and the environment
C.
They are easy to apply and require no specialized equipment
D.
They promote the development of beneficial soil microbes
Question No. 28
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Which nematode management strategy involves the use of heat to kill nematodes?
A.
Crop rotation
B.
Soil solarization
C.
Biological control
D.
Chemical fumigation
Question No. 29
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What is the principle behind soil solarization for nematode control?
A.
Using solar energy to heat the soil and kill nematodes
B.
Applying solar-powered nematicides
C.
Planting crops that attract solar radiation
D.
Using reflective mulches to repel nematodes
Question No. 30
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Which of these is a regulatory method for preventing the spread of nematodes?
A.
Quarantine regulations on plant material
B.
Crop rotation
C.
Biological control
D.
Soil solarization
Question No. 31
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What is the role of quarantine in nematode management?
A.
To prevent the introduction and spread of nematodes to new areas
B.
To eradicate existing nematode populations
C.
To promote the use of resistant crop varieties
D.
To encourage the use of chemical nematicides
Question No. 32
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What is the benefit of using healthy planting material for nematode control?
A.
It prevents the introduction of nematodes to a new field
B.
It ensures a higher yield
C.
It reduces the need for other control methods
D.
It improves soil fertility
Question No. 33
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Which of the following is a characteristic of a good trap crop for nematode management?
A.
It is highly susceptible to the target nematode
B.
It allows the nematode to reproduce easily
C.
It is resistant to the target nematode
D.
It is easy to grow and destroy
Question No. 34
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What is the mechanism by which flooding controls nematodes?
A.
It deprives nematodes of oxygen
B.
It increases soil temperature
C.
It leaches out essential nutrients for nematodes
D.
It introduces beneficial microbes that kill nematodes
Question No. 35
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Which of these is a cultural control method for nematodes?
A.
Applying chemical nematicides
B.
Using resistant crop varieties
C.
Introducing predatory nematodes
D.
Solarizing the soil
Question No. 36
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Which of the following is an example of biological control of nematodes?
A.
Using chemical fumigants
B.
Applying hot water treatment
C.
Using nematode-trapping fungi
D.
Rotating crops
Question No. 37
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What is the role of *Paecilomyces lilacinus* in nematode control?
A.
It is a bacterial parasite of nematodes
B.
It is a fungal parasite of nematode eggs
C.
It is a predatory nematode
D.
It is a plant growth-promoting rhizobacteria
Question No. 38
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Which of these is an example of a nematode-resistant crop?
A.
A susceptible tomato variety
B.
A resistant tomato variety
C.
A susceptible potato variety
D.
A susceptible cucumber variety
Question No. 39
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What is the importance of knowing the specific nematode species present in a field?
A.
It helps in selecting the most effective control method
B.
It is not important for nematode management
C.
It only affects crop yield
D.
It determines the soil type
Question No. 40
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Which factor can influence the effectiveness of nematode control methods?
A.
Soil type
B.
Weather conditions
C.
Nematode population density
D.
All of the above
Question No. 41
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What is the role of crop rotation in managing nematode populations?
A.
It allows for the buildup of beneficial soil microbes
B.
It disrupts the nematode life cycle
C.
It improves soil fertility
D.
It increases water infiltration
Question No. 42
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Which of the following is a symptom of nematode infestation in plants?
A.
Stunted growth
B.
Root knots or galls
C.
Wilting
D.
All of the above
Question No. 43
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What are root knots or galls caused by?
A.
Fungal infection
B.
Bacterial infection
C.
Nematode infestation
D.
Viral infection
Question No. 44
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Which type of nematode causes root knots or galls?
A.
Cyst nematodes
B.
Root-knot nematodes
C.
Lesion nematodes
D.
Stem nematodes
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