Insects, pests and diseases of major crops and their management Part 1
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Question No. 1
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Which of the following is a sucking pest of cotton?
A.
Helicoverpa armigera
B.
Earias vittella
C.
Bemisia tabaci
D.
Pectinophora gossypiella
Question No. 2
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The 'dead heart' symptom in rice is caused by which insect pest?
A.
Rice Hispa
B.
Yellow Stem Borer
C.
Gall Midge
D.
Brown Plant Hopper
Question No. 3
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Late blight of potato is caused by a pathogen belonging to which group?
A.
Fungus
B.
Bacteria
C.
Virus
D.
Phytoplasma
Question No. 4
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Grassy shoot disease of sugarcane is transmitted by?
A.
Aphids
B.
Whiteflies
C.
Leafhoppers
D.
Mealybugs
Question No. 5
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Which of the following is a bio-agent used for the management of lepidopteran pests?
A.
Trichoderma viride
B.
Pseudomonas fluorescens
C.
Bacillus thuringiensis
D.
Metarhizium anisopliae
Question No. 6
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Rust disease of wheat is caused by which genus of fungi?
A.
Ustilago
B.
Puccinia
C.
Alternaria
D.
Fusarium
Question No. 7
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The economic threshold level (ETL) is the pest density at which:
A.
Management action should be taken to prevent the pest from reaching the economic injury level.
B.
The pest population starts causing initial damage.
C.
The cost of control equals the value of crop damage.
D.
The pest population is at its highest peak.
Question No. 8
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Which of the following is a cultural method for pest management?
A.
Spraying insecticides
B.
Releasing predators
C.
Crop rotation
D.
Using pheromone traps
Question No. 9
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Tundu disease of wheat is caused by a combination of:
A.
Fungus and bacterium
B.
Nematode and bacterium
C.
Virus and fungus
D.
Nematode and virus
Question No. 10
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White grubs are the damaging stage of which group of insects?
A.
Moths
B.
Beetles
C.
Flies
D.
Wasps
Question No. 11
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Which of the following is a systemic fungicide?
A.
Mancozeb
B.
Copper oxychloride
C.
Carbendazim
D.
Sulphur
Question No. 12
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The fall armyworm (Spodoptera frugiperda) is a major pest of which crop in India?
A.
Rice
B.
Wheat
C.
Maize
D.
Sugarcane
Question No. 13
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Karnal bunt of wheat is a __________ disease.
A.
Seed-borne
B.
Air-borne
C.
Soil-borne
D.
Water-borne
Question No. 14
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Pink bollworm is a major pest of which crop?
A.
Soybean
B.
Groundnut
C.
Cotton
D.
Maize
Question No. 15
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Citrus canker is a disease caused by a:
A.
Fungus
B.
Virus
C.
Bacterium
D.
Nematode
Question No. 16
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Pheromone traps are used in pest management for:
A.
Killing all insects
B.
Monitoring pest populations
C.
Repelling pests
D.
Sterilizing male insects
Question No. 17
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Which of the following is an example of a botanical insecticide?
A.
Malathion
B.
Carbaryl
C.
Neem oil
D.
DDT
Question No. 18
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Loose smut of wheat is a disease that affects the:
A.
Roots
B.
Leaves
C.
Stem
D.
Inflorescence
Question No. 19
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What is the primary mode of action of organophosphate insecticides?
A.
Stomach poison
B.
Nerve poison
C.
Contact poison
D.
Respiratory poison
Question No. 20
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‘Tikka’ disease is a major disease of which crop?
A.
Paddy
B.
Maize
C.
Groundnut
D.
Soybean
Question No. 21
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Which of the following is a viral disease of tomato?
A.
Early blight
B.
Late blight
C.
Bacterial wilt
D.
Tomato leaf curl
Question No. 22
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The pest that causes 'silver shoot' or 'onion leaf' in rice is:
A.
Gall midge
B.
Stem borer
C.
Leaf folder
D.
Planthopper
Question No. 23
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Integrated Pest Management (IPM) emphasizes:
A.
Total eradication of pests
B.
Only chemical control
C.
A combination of control methods
D.
Only biological control
Question No. 24
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Which insect is a vector for the Tungro virus in rice?
A.
Green leafhopper
B.
White-backed planthopper
C.
Brown planthopper
D.
Rice gundhi bug
Question No. 25
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Red rot is a serious disease of:
A.
Maize
B.
Wheat
C.
Sugarcane
D.
Cotton
Question No. 26
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Which of the following is NOT a component of the 'disease triangle'?
A.
A susceptible host
B.
A virulent pathogen
C.
A favorable environment
D.
A resistant variety
Question No. 27
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The 'hopper burn' symptom in rice is caused by:
A.
Yellow stem borer
B.
Brown plant hopper
C.
Rice hispa
D.
Leaf folder
Question No. 28
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Which of the following is an example of a bio-fungicide?
A.
Captan
B.
Thiram
C.
Trichoderma harzianum
D.
Mancozeb
Question No. 29
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The insect responsible for transmitting cotton leaf curl virus is:
A.
Aphid
B.
Jassid
C.
Whitefly
D.
Thrips
Question No. 30
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What is the characteristic symptom of downy mildew of grapevine?
A.
White powdery growth on the upper leaf surface
B.
Yellowish, oily spots on the upper leaf surface and white downy growth on the underside
C.
Black sooty mold on leaves
D.
Concentric rings on leaves
Question No. 31
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The term 'quarantine' in plant protection refers to:
A.
Treating seeds with chemicals
B.
Restricting the introduction of pests and diseases from one area to another
C.
Harvesting the crop at a specific time
D.
Using resistant varieties
Question No. 32
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Which of the following pests is known for its ability to develop resistance to insecticides very quickly?
A.
Diamondback moth
B.
Ladybird beetle
C.
Honey bee
D.
Earthworm
Question No. 33
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Bacterial leaf blight of rice is caused by:
A.
Pseudomonas oryzae
B.
Xanthomonas oryzae pv. oryzae
C.
Erwinia carotovora
D.
Ralstonia solanacearum
Question No. 34
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Which of the following is a storage pest?
A.
Termite
B.
Aphid
C.
Rice weevil
D.
Grasshopper
Question No. 35
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The practice of growing a trap crop is a form of:
A.
Chemical control
B.
Biological control
C.
Cultural control
D.
Physical control
Question No. 36
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What is the primary damage caused by aphids?
A.
Boring into stems
B.
Chewing leaves
C.
Sucking plant sap
D.
Cutting roots
Question No. 37
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Smut diseases of cereals are caused by fungi belonging to the order:
A.
Uredinales
B.
Ustilaginales
C.
Erysiphales
D.
Peronosporales
Question No. 38
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The 'dead heart' and 'white ear' symptoms in sugarcane are caused by:
A.
Pyrilla
B.
Whitefly
C.
Early shoot borer
D.
Termite
Question No. 39
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Which of the following is an insect growth regulator (IGR)?
A.
Cypermethrin
B.
Chlorpyrifos
C.
Neem oil (Azadirachtin)
D.
Endosulfan
Question No. 40
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Wilt of pigeon pea is mainly caused by a:
A.
Soil-borne fungus
B.
Seed-borne virus
C.
Air-borne bacterium
D.
Foliar nematode
Question No. 41
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Which part of the plant is primarily affected by powdery mildew?
A.
Roots
B.
Internal vascular tissue
C.
Leaves and stem surface
D.
Flowers
Question No. 42
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The use of light traps is a method of:
A.
Chemical control
B.
Mechanical control
C.
Biological control
D.
Cultural control
Question No. 43
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Which of the following is a polyphagous pest?
A.
Mustard aphid
B.
Rice stem borer
C.
Helicoverpa armigera
D.
Red cotton bug
Question No. 44
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Anthracnose disease is commonly observed on which of the following crops?
A.
Wheat
B.
Beans
C.
Potato
D.
Mustard
Question No. 45
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The 'gundhi bug' of rice is a pest that damages the crop at which stage?
A.
Seedling stage
B.
Tillering stage
C.
Milking stage
D.
Maturity stage
Question No. 46
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Which of the following is an example of classical biological control?
A.
Periodic release of laboratory-reared natural enemies
B.
Conservation of existing natural enemies
C.
Introduction of a natural enemy from the pest's native region to a new area
D.
Application of microbial pesticides
Question No. 47
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The 'Jassid' is a major sucking pest of which crop?
A.
Sugarcane
B.
Cotton
C.
Wheat
D.
Rice
Question No. 48
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Ergot of bajra is a disease that produces:
A.
Black powdery spores in the earhead
B.
A sticky, honey-dew like substance from the florets
C.
Small, brown leaf spots
D.
Root galls
Question No. 49
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The primary purpose of seed treatment is to:
A.
Increase seed germination rate
B.
Control soil-borne and seed-borne diseases
C.
Provide nutrients to the seedling
D.
Improve seed size
Question No. 50
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Which of the following is a rodent pest of field crops?
A.
Bandicoot rat
B.
Fruit fly
C.
Epilachna beetle
D.
House crow
Question No. 51
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The symptom of 'shot holes' on the leaves of fruit trees is commonly caused by:
A.
A viral infection
B.
A bacterial disease
C.
Damage from sucking pests
D.
A fungal disease or spray injury
Question No. 52
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What is the vector for the yellow vein mosaic virus of okra (bhindi)?
A.
Aphid
B.
Leafhopper
C.
Whitefly
D.
Thrips
Question No. 53
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Which of the following management practices would be most effective against soil-borne diseases like damping-off?
A.
Foliar spraying of fungicides
B.
Use of systemic insecticides
C.
Soil solarization
D.
Installation of bird perches
Question No. 54
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The term 'hyperparasite' refers to an organism that:
A.
Is a parasite of a parasite
B.
Is parasitic on a plant
C.
Is an internal parasite
D.
Is a parasite of an insect pest
Question No. 55
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Which of the following is a weed that also acts as an alternate host for some crop pests?
A.
Parthenium hysterophorus
B.
Chenopodium album
C.
Cyperus rotundus
D.
All of the above
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