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By: patpour (17 month(s) ago)

Dear, I am Mehran Patpour. I have started PhD study on Wheat Stem Rust, and It seems your powerpoint is very useful for me to increase my knowledge around this area of science, it would be appreciated if you kindly send me a copy of powerpoint or let me download it.

 

By: kprasanna (30 month(s) ago)

Sir, Presentation on diseases caused by Bascidiomycetes II is very good.I find it usefull. kindly allow me to download. regards, Prasanna

Presentation Transcript

Diseases Caused By Basidiomycetes II: 

Diseases Caused By Basidiomycetes II

Rusts: 

Rusts Member of the order Uredinales Obligate biotrophs Multiple spore stages Heteroecious – needs two different hosts to comple life cycle Rusts with two or fewer spore stages – microcyclic rusts Rusts with more than two spore stages – macrocyclic rusts

Stem Rust of Wheat Puccinia graminis : 

Stem Rust of Wheat Puccinia graminis World wide distribution Macrocyclic, heteroecious rust Spermatia and Aceia – barberry Uredia and Telia – wheat Secondary Cycle – urediospores

Slide4: 

Stem Rust of Wheat Spore Stages Stage Host Produced On Nuclear Condition Basidiospores None N Spermatia Barberry N Aceiospores Barberry N+N Urediospores Wheat N+N Teliospores Wheat N+N & 2N

Symptoms and Signs on Barberry: 

Symptoms and Signs on Barberry Spermagonia Aceia

Common Barberry - Susceptible: 

Common Barberry - Susceptible

Japanese Barberry - Resistant: 

Japanese Barberry - Resistant

Uredia and Telia on Wheat: 

Uredia and Telia on Wheat

Puccinia graminis – Life Cycle: 

Puccinia graminis – Life Cycle

Stem Rust – Disease Cycle: 

Stem Rust – Disease Cycle

Cedar Apple Rust Gymnosporangiusm juniper-virginianae: 

Cedar Apple Rust Gymnosporangiusm juniper-virginianae

Symptoms and Signs of Cedar Apple Rust: 

Symptoms and Signs of Cedar Apple Rust

Life Cylce of G. juniper-virginianae: 

Life Cylce of G. juniper-virginianae

Fusiform Rust Cronartium fusiforme: 

Fusiform Rust Cronartium fusiforme

Signs and Symptoms of Fusiform Rust: 

Signs and Symptoms of Fusiform Rust Spermatia and aceia on Loblolly pine Wind damage Uredia on oak

Life Cycle of Cronartium fusiforme: 

Life Cycle of Cronartium fusiforme

Control of Fusiform Rust: 

Control of Fusiform Rust Fungicides in nurseries Avoid fertilization until seedlings are beyond extreme hazard stage: 8 years Resistance Hazard Map for Fusiform Rust on Loblolly Pine

Pine Oak Rust Cronartium quercuum: 

Pine Oak Rust Cronartium quercuum Aceia on Jack Pine Uredia and Telia on Oak

Daylily Rust Puccinia hemerocallidis: 

Daylily Rust Puccinia hemerocallidis

Daylily Rust : 

Daylily Rust Exotic pathogen first seen in TN in 2001 Alternate host is Patrinia May not survive winters in TN

Daylily Streak and Rust Can Look Similar!: 

Daylily Streak and Rust Can Look Similar! Daylily Streak Daylily Rust

So how do I tell if it’s rust?: 

So how do I tell if it’s rust? The Tissue Test

Control of Daylily Rust: 

Control of Daylily Rust Inspect new plants before selling or planting them Fungicides may be effective

Other Rust Diseases: 

Other Rust Diseases Geranium Snap Dragon Hollyhock Mayapple

Rust of Natives: 

Rust of Natives Jack-in-the-pulpit Green dragon

Rust on turf: 

Rust on turf Favored by low nitrogen Perennial rye, some cultivars of tall fescue and blue grass are suceptible Late season nitrogen application lessens disease Fungicides

Corn Smut Ustilago maydis: 

Corn Smut Ustilago maydis

Corn Smut: 

Corn Smut Smuts in order Ustilaginales Most smuts attack ovaries of grains Two types of spores by most smuts – teliospores and basidiospores Dikaryotic mycelium

Corn Smut - Symptoms and Signs: 

Corn Smut - Symptoms and Signs

Ustilago maydis – Life Cycle: 

Ustilago maydis – Life Cycle