agents of disease ‐‐ fungi - ucanr
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiOther Ascomycetes and Imperfects‐ Fruit
Powdery Mildew on Apricot
Alternaria on Tomato
Shothole on AlmondShothole on Almond
Colletotrichum fruit lesionBotrytus on Strawberry
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Agents of Disease ‐ Fungig gOther Ascomycetes and Imperfects– Flowers, Leaves, VegetablesVegetables
Anthracnose of Snap BeanBlack Spot of RoseVerticillium Wilt of Eggplant
Alternaria on PapayaPowdery mildew on Grape White Mold of Lettuce
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiOther Ascomycetes and Imperfects– Trees and Shrubs
B h iBotryosphaeriaLeucostomaSycamore Dutch Elm Disease
Sycamore Anthracnose Trees with Stem and Branch Cankers
Leucostoma canker on PrunusBotryosphaeria CankerSycamore Anthracnose
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiOther Ascomycetes and Imperfects– Postharvest (30% of total loss!)
Black Mold of Carrot Penicillium on Orange Aspergillus on Grain
Fusarium Rot of Melon Sour Rot of MelonRhizopus on Peaches
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Agents of Disease FungiAgents of Disease ‐ FungiBasidiomycetesBasidiomycetes
– Club fungi – produce sexual spores in a sac
• Typically have 4 badiospores on a basidium
– Reproduces asexually asReproduces asexually as well
– Produces most mushrooms puffballsmushrooms, puffballs, conks
– Cause wood rots, rusts, and smuts
– Majority are wood rotters, important in naturalimportant in natural ecosystems. Photo from:
http://www.toxinology.com/generic_static_files/images_generic/MD‐fig1E‐basidia.gif
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Agents of Disease FungiDiseases caused by Basidiomycetes
Agents of Disease ‐ Fungi
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Agents of Disease FungiDisease cycle of White Pine Blister Rust (Cronartium ribicola)
Agents of Disease ‐ Fungi
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Agents of Disease FungiDisease cycle of White Pine Blister Rust (Cronartium ribicola)
Agents of Disease ‐ Fungi
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Agents of Disease FungiAgents of Disease ‐ FungiDisease cycle of Armillaria Root Rot (Armillaria mellea)
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiBasidiomycetes– Flowers, Leaves, Vegetables
Rust on Roses
Corn Smut
Dampening off by RhizoctoniaStem Rust of Wheat
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiBasidiomycetes – Trees and Shrubs
Armillaria Root RotTree Decline Caused by Fungi
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Agents of Disease ‐ FungiAgents of Disease ‐ Fungi“Fungal – Like” OrganismsFungal Like Organisms
– More closely related to plants than fungip g
• Cell wall is made of cellulose
– Reproduces sexually and llasexually
– Root rots, blights, mildews (underside of leaves) and(underside of leaves), and soft rots
– Cool, wet/humid weather
– Very difficult to control due to cell wall material and soil i h bitinhabitance
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Agents of Disease ‐ FungiAgents of Disease ‐ FungiDisease cycle of Potato Late Blight (Phytophthora infestans)
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Agents of Disease ‐ FungiAgents of Disease ‐ Fungi“Fungal‐like” Organisms – Vegetables and Trees
Dampening off by Pythium
Tree loss caused by Phytophthora
Downey Mildew – NOTE:Downey Mildew – NOTE: Spores are on UNDERside of leaf