FPT 305: Postharvest Disease and Pest Control Introduction Quiz

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What is the role of hydrophobins in the adhesion process of a spore to a leaf surface?

Acting as a defense mechanism for the plant

Strengthening the adhesion between the spore and the leaf surface (correct)

Breaking down the leaf cuticle for easier penetration

Initiating the growth of the emerging hypha

What triggers the enlargement and strengthening of the hyphal tip in a plant pathogen?

Interaction with other fungal hyphae

Encountering a stoma on the leaf surface

Detection of an appropriate site (correct)

Exposure to sunlight

Why is it necessary for a growing hypha to have a strong hold on the leaf surface?

To prevent water loss from the leaf

To reduce the plant's defense mechanisms

To support mechanical force used for penetration (correct)

To increase photosynthesis in the plant

What is the purpose of the plant cuticle in interactions with fungal pathogens?

Serving as a protection barrier for the plant Signup and view all the answers

Which feature allows a growing hypha to sense very minute alterations on the leaf surface?

Surface texture and spacing between ridges Signup and view all the answers

What role do components of the cuticle, such as cutin, play in plant-fungus interactions?

Providing structural support and protection for the plant Signup and view all the answers

What is the definition of plant disease according to the text?

Any disturbance by a pathogen or an environmental factor that interferes with normal physiological processes in a plant Signup and view all the answers

Why are plant diseases considered important to humans?

They damage plants and plant products on which humans depend for various needs Signup and view all the answers

How might plant diseases impact the quantity of plant produce?

They can cause anywhere from 0 to 100% yield loss Signup and view all the answers

Which plant disease led to the extinction of the American chestnut as a timber tree in North America?

Chestnut blight disease Signup and view all the answers

What impact do spots, scabs, and blotches have on fruits and vegetables?

They cause inferior quality Signup and view all the answers

How do plant diseases impact plant products according to the text?

They can render plant products unfit for human or animal consumption Signup and view all the answers

Which of the following is a well-known alkaloid found in ergots?

Lysergic acid diethylamide Signup and view all the answers

What are some consequences of plant diseases on society?

All of the above Signup and view all the answers

Which organism is classified as an obligate parasite?

An organism that can only survive on the living host Signup and view all the answers

Which of the following is NOT a type of pathogen?

Protozoa Signup and view all the answers

What is the primary goal of a pathogen when attacking a plant?

To cause disease and assure its own survival Signup and view all the answers

What is the role of a host organism?

To provide nourishment to another organism Signup and view all the answers

How do pathogens ensure their own survival and cause disease in plants?

By employing mechanisms for attachment, identification, and invasion of suitable hosts Signup and view all the answers

What was the impact of the late blight of Potato in 1845 on Ireland?

Resulted in a great famine with 2 million deaths and mass migration to the USA Signup and view all the answers

What is the function of ergots containing alkaloids like lysergic acid diethylamide?

Affecting the course of history through severe consequences Signup and view all the answers

Which of the following is an example of a plant pathogen mentioned in the text?

Fungi Signup and view all the answers

What term is used for an organism that can only survive on a living host?

Obligate parasite Signup and view all the answers

Why could resistant varieties be considered expensive according to the text?

As they involve research and development costs Signup and view all the answers