Biology MCQs

Plant Pathology MCQs with Answers

Which of the following is a plant disease caused by a fungal pathogen?
a) Bacterial wilt
b) Citrus canker
c) Potato late blight
d) Tobacco mosaic virus
Answer: c) Potato late blight

What is the term for the study of plant diseases?
a) Phytopathology
b) Plant physiology
c) Plant pathology
d) Plant genetics
Answer: a) Phytopathology

Which of the following is a symptom of a viral plant disease?
a) Wilting
b) Yellowing of leaves
c) Root rot
d) Leaf spots
Answer: b) Yellowing of leaves

What is the term for a disease-causing organism?
a) Pathogen
b) Vector
c) Host
d) Parasite
Answer: a) Pathogen

Which of the following is a method for managing plant diseases?
a) Crop rotation
b) Pesticide application
c) Genetic engineering
d) All of the above
Answer: d) All of the above

What is the term for a plant disease that affects the vascular system?
a) Leaf spot
b) Root rot
c) Wilting
d) Rust
Answer: c) Wilting

Which of the following is a bacterial plant pathogen?
a) Fusarium oxysporum
b) Pythium ultimum
c) Xanthomonas oryzae
d) Botrytis cinerea
Answer: c) Xanthomonas oryzae

What is the term for a disease-resistant plant variety?
a) Hybrid
b) Mutant
c) Cultivar
d) Transgenic
Answer: c) Cultivar

Which of the following is a fungal plant pathogen that causes powdery mildew?
a) Phytophthora infestans
b) Magnaporthe oryzae
c) Erysiphe cichoracearum
d) Pseudomonas syringae
Answer: c) Erysiphe cichoracearum

What is the term for the transmission of plant diseases through infected seeds?
a) Vertical transmission
b) Horizontal transmission
c) Mechanical transmission
d) Vector transmission
Answer: a) Vertical transmission

Which of the following is a symptom of a fungal plant disease?
a) Stunting
b) Leaf curling
c) Root decay
d) Ring spot
Answer: d) Ring spot

What is the term for the practice of removing and destroying infected plant materials to control the spread of diseases?
a) Quarantine
b) Sanitation
c) Disinfection
d) Fumigation
Answer: b) Sanitation

Which of the following is a viral plant pathogen that causes mosaic symptoms on tobacco leaves?
a) Xanthomonas oryzae
b) Phytophthora infestans
c) Tomato spotted wilt virus
d) Tobacco mosaic virus
Answer: d) Tobacco mosaic virus

What is the term for a disease-resistant plant variety developed through traditional breeding methods?
a) Transgenic plant
b) Genetically modified plant
c) Hybrid plant
d) Conventional plant
Answer: c) Hybrid plant

Which of the following is a nematode plant pathogen?
a) Agrobacterium tumefaciens
b) Rhizoctonia solani
c) Meloidogyne incognita
d) Alternaria solani
Answer: c) Meloidogyne incognita

What is the term for the study of plant diseases in the field?
a) Epidemiology
b) Virology
c) Mycology
d) Bacteriology
Answer: a) Epidemiology

Which of the following is a cultural control method for plant diseases?
a) Use of resistant varieties
b) Crop rotation
c) Chemical spraying
d) Biological control
Answer: b) Crop rotation

What is the term for a plant disease caused by a parasitic flowering plant?
a) Rust
b) Smut
c) Dodder
d) Wilt
Answer: c) Dodder

Which of the following is an example of a plant disease caused by a phytoplasma?
a) Wheat rust
b) Fire blight
c) Citrus greening
d) Crown gall
Answer: c) Citrus greening

What is the term for the practice of introducing beneficial organisms to control plant diseases?
a) Genetic engineering
b) Biological control
c) Chemical control
d) Cultural control
Answer: b) Biological control

Which of the following is a symptom of a bacterial plant disease?
a) Powdery growth on leaves
b) Wilting and stunting
c) Ring-shaped lesions on fruits
d) Chlorosis and necrosis of leaves
Answer: d) Chlorosis and necrosis of leaves

What is the term for a plant disease caused by a phytopathogenic bacterium that forms galls on plant tissues?
a) Crown gall
b) Root rot
c) Leaf spot
d) Rust
Answer: a) Crown gall

Which of the following is a symptom of a nematode plant disease?
a) Leaf curling
b) Root decay
c) Ring spot
d) Stunting
Answer: d) Stunting

What is the term for the practice of using chemicals to control plant diseases?
a) Chemical control
b) Genetic engineering
c) Biological control
d) Cultural control
Answer: a) Chemical control

Which of the following is a fungal plant pathogen that causes brown rot in fruits?
a) Fusarium oxysporum
b) Botrytis cinerea
c) Phytophthora infestans
d) Rhizoctonia solani
Answer: b) Botrytis cinerea

What is the term for a plant disease caused by a pathogen that survives in the soil?
a) Soil-borne disease
b) Airborne disease
c) Waterborne disease
d) Vector-borne disease
Answer: a) Soil-borne disease

Which of the following is a symptom of a fungal plant disease?
a) Mottled leaves
b) Stunted growth
c) Fruit rot
d) Leaf curling
Answer: c) Fruit rot

What is the term for a plant disease caused by a pathogen that is transmitted by an insect or other organism?
a) Vector-borne disease
b) Soil-borne disease
c) Airborne disease
d) Waterborne disease
Answer: a) Vector-borne disease

Which of the following is a symptom of a fungal plant disease?
a) Yellowing of leaves
b) Wilting and stunting
c) Root decay
d) Leaf spots
Answer: d) Leaf spots

What is the term for a plant disease caused by a parasitic fungus that forms black masses of spores?
a) Rust
b) Smut
c) Dodder
d) Wilt
Answer: b) Smut

Which of the following is a viral plant pathogen that causes mosaic symptoms on tomato leaves?
a) Tomato spotted wilt virus
b) Tobacco mosaic virus
c) Phytophthora infestans
d) Xanthomonas oryzae
Answer: a) Tomato spotted wilt virus

What is the term for the practice of isolating and containing infected plants to prevent the spread of diseases?
a) Quarantine
b) Sanitation
c) Disinfection
d) Fumigation
Answer: a) Quarantine

Which of the following is a bacterial plant pathogen that causes fire blight in fruit trees?
a) Xanthomonas oryzae
b) Pseudomonas syringae
c) Agrobacterium tumefaciens
d) Erwinia amylovora
Answer: d) Erwinia amylovora

What is the term for the transmission of plant diseases through wind, rain, or other environmental factors?
a) Airborne transmission
b) Vector transmission
c) Horizontal transmission
d) Mechanical transmission
Answer: a) Airborne transmission

Which of the following is a symptom of a bacterial plant disease?
a) Yellowing of leaves
b) Wilting and stunting
c) Root rot
d) Leaf spots with water-soaked margins
Answer: d) Leaf spots with water-soaked margins

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated water?
a) Waterborne disease
b) Airborne disease
c) Soil-borne disease
d) Vector-borne disease
Answer: a) Waterborne disease

Which of the following is a symptom of a viral plant disease?
a) Wilting and stunting
b) Root rot
c) Leaf spots with yellow halos
d) Leaf curling
Answer: d) Leaf curling

What is the term for a plant disease caused by a parasitic plant that twines around host plants and extracts nutrients?
a) Rust
b) Smut
c) Dodder
d) Wilt
Answer: c) Dodder

Which of the following is a symptom of a nematode plant disease?
a) Yellowing of leaves
b) Wilting and stunting
c) Root decay
d) Leaf spots
Answer: b) Wilting and stunting

What is the term for a plant disease caused by a pathogen that is transmitted by human activities or equipment?
a) Mechanical transmission
b) Horizontal transmission
c) Airborne transmission
d) Vector transmission
Answer: a) Mechanical transmission

Which of the following is a symptom of a fungal plant disease?
a) Chlorosis and necrosis of leaves
b) Leaf curling
c) Root decay
d) Stunting
Answer: a) Chlorosis and necrosis of leaves

What is the term for the practice of using genetically modified organisms to control plant diseases?
a) Genetic engineering
b) Biological control
c) Chemical control
d) Cultural control
Answer: a) Genetic engineering

Which of the following is a fungal plant pathogen that causes damping-off in seedlings?
a) Xanthomonas oryzae
b) Fusarium oxysporum
c) Phytophthora infestans
d) Pythium ultimum
Answer: d) Pythium ultimum

What is the term for a plant disease caused by a pathogen that is transmitted by an animal or insect?
a) Vector-borne disease
b) Soil-borne disease
c) Airborne disease
d) Waterborne disease
Answer: a) Vector-borne disease

Which of the following is a symptom of a bacterial plant disease?
a) Mottled leaves
b) Wilting and stunting
c) Fruit rot
d) Leaf curling
Answer: b) Wilting and stunting

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated soil or plant debris?
a) Soil-borne disease
b) Airborne disease
c) Waterborne disease
d) Vector-borne disease
Answer: a) Soil-borne disease

Which of the following is a symptom of a fungal plant disease?
a) Leaf yellowing
b) Wilting and stunting
c) Root decay
d) Leaf spots with concentric rings
Answer: d) Leaf spots with concentric rings

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated water or irrigation systems?
a) Waterborne disease
b) Airborne disease
c) Soil-borne disease
d) Vector-borne disease
Answer: a) Waterborne disease

Which of the following is a symptom of a viral plant disease?
a) Mottled leaves
b) Wilting and stunting
c) Root rot
d) Leaf spots with water-soaked margins
Answer: a) Mottled leaves

What is the term for the practice of using naturally occurring predators or parasites to control plant diseases?
a) Biological control
b) Genetic engineering
c) Chemical control
d) Cultural control
Answer: a) Biological control

Which of the following is a symptom of a bacterial plant disease?
a) Wilting and stunting
b) Root decay
c) Leaf spots with yellow halos
d) Leaf curling
Answer: c) Leaf spots with yellow halos

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated air or wind?
a) Airborne disease
b) Vector-borne disease
c) Soil-borne disease
d) Waterborne disease
Answer: a) Airborne disease

Which of the following is a symptom of a fungal plant disease?
a) Stunted growth
b) Leaf curling
c) Fruit rot
d) Leaf spots with water-soaked margins
Answer: a) Stunted growth

What is the term for a plant disease caused by a parasitic fungus that forms rust-colored lesions on leaves?
a) Rust
b) Smut
c) Dodder
d) Wilt
Answer: a) Rust

Which of the following is a symptom of a nematode plant disease?
a) Mottled leaves
b) Wilting and stunting
c) Root decay
d) Leaf spots with concentric rings
Answer: b) Wilting and stunting

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated soil or growing media?
a) Soil-borne disease
b) Airborne disease
c) Waterborne disease
d) Vector-borne disease
Answer: a) Soil-borne disease

Which of the following is a symptom of a bacterial plant disease?
a) Leaf yellowing
b) Wilting and stunting
c) Root decay
d) Leaf spots with concentric rings
Answer: b) Wilting and stunting

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated water or plant sap?
a) Waterborne disease
b) Airborne disease
c) Soil-borne disease
d) Vector-borne disease
Answer: a) Waterborne disease

Which of the following is a symptom of a viral plant disease?
a) Yellowing of leaves
b) Wilting and stunting
c) Root rot
d) Leaf spots with concentric rings
Answer: a) Yellowing of leaves

What is the term for the practice of using chemicals to control plant diseases?
a) Chemical control
b) Genetic engineering
c) Biological control
d) Cultural control
Answer: a) Chemical control

Which of the following is a symptom of a bacterial plant disease?
a) Mottled leaves
b) Wilting and stunting
c) Fruit rot
d) Leaf curling
Answer: b) Wilting and stunting

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated air or wind?
a) Airborne disease
b) Vector-borne disease
c) Soil-borne disease
d) Waterborne disease
Answer: a) Airborne disease

Which of the following is a symptom of a fungal plant disease?
a) Chlorosis and necrosis of leaves
b) Leaf curling
c) Root decay
d) Stunting
Answer: a) Chlorosis and necrosis of leaves

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated soil or plant debris?
a) Soil-borne disease
b) Airborne disease
c) Waterborne disease
d) Vector-borne disease
Answer: a) Soil-borne disease

Which of the following is a symptom of a viral plant disease?
a) Mottled leaves
b) Wilting and stunting
c) Root rot
d) Leaf spots with water-soaked margins
Answer: a) Mottled leaves

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated water or irrigation systems?
a) Waterborne disease
b) Airborne disease
c) Soil-borne disease
d) Vector-borne disease
Answer: a) Waterborne disease

Which of the following is a symptom of a bacterial plant disease?
a) Yellowing of leaves
b) Wilting and stunting
c) Root decay
d) Leaf spots with yellow halos
Answer: d) Leaf spots with yellow halos

What is the term for a plant disease caused by a pathogen that is transmitted through contaminated human activities or equipment?
a) Mechanical transmission
b) Horizontal transmission
c) Airborne transmission
d) Vector transmission
Answer: a) Mechanical transmission

Which of the following is a symptom of a fungal plant disease?
a) Stunted growth
b) Leaf curling
c) Fruit rot
d) Leaf spots with concentric rings
Answer: a) Stunted growth

What is the term for a plant disease caused by a parasitic fungus that forms rust-colored lesions on leaves?
a) Rust
b) Smut
c) Dodder
d) Wilt
Answer: a) Rust

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