lab_quiz5 - Copy

lab_quiz5 - Copy - Sclerotinia ? What type of pathogen...

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Laboratory Quiz 5 NAME__ SECTION__________ 1. (2 pts) What are the two types of symptoms that may result from ergotism in humans? Convulsive and Gangrenous 4. (3 pts) What two structures give rise to apothecia? Give an example of a fungus pathogen, use the scientific name, that produces each structure. Sclerotia and mummies. Claviceps purpurea produces sclerotia in seed lots. Monilinia fructicola provide mummies for apothecia. 5. (2 pts) What disease covered in lab this week can be referred to as a “replacement disease”? What does this term mean? Ergot diseases replace the biological matter of a plant with its own biological matter. 6. (2 pts) Why is plant debris important in the initiation of many diseases caused by
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Unformatted text preview: Sclerotinia ? What type of pathogen (trophic level) is Sclerotinia ? Sclerotinia easily reproduces in the plant debris near hosts. Sclerotinia is a necrotrophic plant. 7. (3 pts) What two spore types are produced by the apple scab pathogen, Venturia inaequalis ? What role does each play in the development of apple scab epidemics? Ascospores serve as the primary inoculums. Conidia perpetuate the disease and serve as the secondary inoculum. 8. (3 pts) What is oxalic acid? How is it utilized by Sclerotinia sclerotiorum during infection? Oxalic acid is a cell degrading compound that is used to aid infection and colonization by the sclerotinia species of disease....
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