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Mycology: Biotrophic Mycoparasites and Biological Control

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Mycology: Biotrophic Mycoparasites and Biological Control

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Questions and Answers

What is a characteristic of necrotrophic mycoparasites?

They produce vitamins as part of the parasitic process.

They have a narrow host range.

They produce organic acids as part of the parasitic process.

They have characteristically wide host ranges. (correct)

How does Clonostachys rosea antagonize fungi in nutrient-rich conditions?

By producing proteins that inhibit fungal growth

By producing alcohols that kill fungal cells

By producing diffusible inhibitors (correct)

By producing enzymes that break down fungal cell walls

What is a limitation of using Ampelomyces for disease control?

It requires the presence of powdery mildew for survival. (correct)

It is not effective against powdery mildew.

It kills the host plant along with the powdery mildew.

It is too expensive to produce commercially.

What is the stage at which Ampelomyces kills the host hyphae?

When it produces pycnidia over the colony surface Signup and view all the answers

What is the name of the commercially available fungus that controls powdery mildew?

AQ10 Signup and view all the answers

What happens to the host hyphae when Clonostachys rosea comes into contact with them?

They experience localized vacuolation and loss of turgor. Signup and view all the answers

What is the purpose of applying Candida oleophila to fruit surfaces?

To compete for nutrients and reduce fruit-rot fungi Signup and view all the answers

What is Trichodex used for?

To control gray mold on grapes Signup and view all the answers

What is the role of Phlebiopsis gigantea in pine trees?

To rapidly colonize the stump tissues of pine trees Signup and view all the answers

What is Trichodowels used for?

To control silver leaf disease Signup and view all the answers

What is the causal agent of gray mold on grapes?

Botrytis cinerea Signup and view all the answers

What is the function of Trichoderma in biological control?

To control fungal pathogens Signup and view all the answers

What is the primary goal of biological control?

To control other living organisms using natural enemies or competitors Signup and view all the answers

Which of the following is an example of purposeful introduction of a control agent?

Using Trichoderma spp. as seedling protectants Signup and view all the answers

What is a characteristic of Trichoderma species' antagonistic behavior?

They coil around and penetrate the hyphae of other fungi Signup and view all the answers

Which of the following is NOT a method of biological control?

Using chemical pesticides to control pests Signup and view all the answers

What is the role of Trichoderma spp. as seedling protectants?

To prevent root rot of seedlings Signup and view all the answers

Which fungus is used to control chestnut blight?

Hypovirulent fungus Signup and view all the answers