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NRES 201 Intro Soil Science Lec. 25-26 Soil Organisms Ch. 10 3/4/2007 5 Fungi Fungi Aerobic Heterotrophs Dominant decay organisms in acid soils, hence, are very important in forest ecosystems ( saprophytic ) Include parasitic species (plant diseases) Symbiotic species (mychorriza) Common Potato Scab Common Potato Scab - Caused by Streptomyces scabies - Controlled by lowering soil pH Fungal Diseases: Fungal Diseases: Actinomycete Diseases: Corn: Corn: - Damping Off - Caused by Pythium, Diplodia, Fusarium, Penicillium
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Unformatted text preview: -Leaf Spot-Caused by Helminithosporium-Stalk Rot-Caused by Caused by Gibberella Gibberella , , Diplodia, Fusarium, Penicillium Fungi Fungi- One group of fungi, the mycorrhizae fungi, form very important symbiotic relationships with plant roots.- Often the success or failure of an introduced tree species is dependent upon the presence of the correct mycorrhizae fungi.- Largest organism in the world is a soil dwelling fungus in Michigan...
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This note was uploaded on 07/23/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.

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