PLP_405_lect_4_questions

PLP_405_lect_4_questions - Rhizoctonia in the plant disease...

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PLP 405 Lecture 4 Review and Discussion Questions 1. What are the defining characteristics of the basidiomycetes? 2. What are rusts and smuts? 3. What is the difference between a microcyclic and macrocyclic rust? What is an autoecious rust? How does this differ from a heteroecious rust? 4. Examine the disease cycle of stinking smut and wheat stem rust (see plant disease lessons on the CD). In what ways are these similar and how do they differ? Why, in theory, should destroying barberries help control stem rust of wheat? Why has this practice not eliminated the disease in wheat growing areas of the US? 5. Describe characteristics of Rhizoctonia and the diseases it causes. Why is Rhizoctonia called a “sterile fungus”? Examine the disease cycle of
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Unformatted text preview: Rhizoctonia in the plant disease lessons on the CD. 6. Describe characteristics of Armillaria and the root rot it causes on woody species. Examine the disease cycle in the plant disease lessons on the CD. What roles do the mushrooms and rhizomorphs play in the disease cycle 7. What characteristics are used to classify a fungus as a zygomycete? Describe the disease cycle of a zygomycete such as Rhizopus . What are sporangia, coenocytic hyphae and zygospores? 8. Describe how you would go about isolating a fungal pathogen into pure culture from infected plant material. What characteristics of the fungus would you use to help determine the type of fungus isolated from the infected plant tissues. Assume that this is a non-obligate parasite....
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