Agents of Disease ‐‐ Fungi - UCANR
Transcript of Agents of Disease ‐‐ Fungi - UCANR
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
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
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
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
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
Agents of Disease FungiDiseases caused by Basidiomycetes
Agents of Disease ‐ Fungi
Agents of Disease FungiDisease cycle of White Pine Blister Rust (Cronartium ribicola)
Agents of Disease ‐ Fungi
Agents of Disease FungiDisease cycle of White Pine Blister Rust (Cronartium ribicola)
Agents of Disease ‐ Fungi
Agents of Disease FungiAgents of Disease ‐ FungiDisease cycle of Armillaria Root Rot (Armillaria mellea)
Agents of Disease ‐ FungiAgents of Disease ‐ FungiBasidiomycetes– Flowers, Leaves, Vegetables
Rust on Roses
Corn Smut
Dampening off by RhizoctoniaStem Rust of Wheat
Agents of Disease ‐ FungiAgents of Disease ‐ FungiBasidiomycetes – Trees and Shrubs
Armillaria Root RotTree Decline Caused by Fungi
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
Agents of Disease ‐ FungiAgents of Disease ‐ FungiDisease cycle of Potato Late Blight (Phytophthora infestans)
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