pathogenesis and seedling diseases
DESCRIPTION
Pathogenesis and Seedling Diseases. LEARNING OBJECTIVES:. The Disease Triangle Heterotrophy and Pathogenesis Saprotrophs, Necrotrophs, and Biotrophs Growth and Reproduction of Fungi in Plants Seedling Diseases Damping-off Fusarium root rot Top Blight Phytophthora root rot. PATHOGEN. - PowerPoint PPT PresentationTRANSCRIPT
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Pathogenesis and Seedling Pathogenesis and Seedling DiseasesDiseases
LEARNING OBJECTIVES:
The Disease TriangleHeterotrophy and Pathogenesis
Saprotrophs, Necrotrophs, and BiotrophsGrowth and Reproduction of Fungi in PlantsSeedling Diseases
Damping-offFusarium root rotTop BlightPhytophthora root rot
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PLANT DISEASE TRIANGLE
ENVIRONMENT
PATHOGEN
HOST
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FOMITOPSIS PINICOLA
RED BELT CONK
“BROWN CRUMBLY ROT”
SAPROTROPHIC FUNGI
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SYCAMORE ANTHRACNOSE
NECROTROPHIC PATHOGENS
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POWDERY MILDEW
HYPHAE ASCOCARPS
BIOTROPHIC PATHOGENS
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Growth of Fungi in Plants HYPHAE
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PATHOGENESISPATHOGENESIS
TOXINSTOXINS
ENZYMESENZYMES
GROWTH REGULATORSGROWTH REGULATORS
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RHYTISMA PUNCTATUM
ACER MACROPHYLLUM
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Cedar root rotPhytophthora lateralis
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Asexual Reproduction of Fungi
Oomycetes- Zoospores
Ascomycetes - Conidiospores
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SWISS NEEDLE CAST
PHAEOCRYPTOPUS GAEUMANNII
Sexual Reproduction of Fungi
Ascospores
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CROP ROTATION
FUMIGATION
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PRECISION SOWING
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PLANT DISEASE TRIANGLE
ENVIRONMENT
PATHOGEN
HOST
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DAMPING OFF– PYTHIUM – a Watermold
HOSTENVIRONMENT
PATHOGEN
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SPORANGIA Release Zoospores
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SEXUAL OOSPORES
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FUSARIUM ROOT ROT or 4TH OF JULY DISEASE– FUSARIUM OXYSPORUM
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HOSTENVIRONMENT
PATHOGEN
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TOP BLIGHT– PHOMA, FUSARIUM
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HOSTENVIRONMENT
PATHOGEN
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WINTER INJURY--ABIOTIC
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“STORAGE BLIGHT” -- ABIOTIC
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PHYTOPHTHORA ROOT ROT IN DOUGLAS-FIR
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SPORANGIA
HOSTENVIRONMENT
PATHOGEN
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OOSPORE
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DAMPING OFF– PYTHIUM
HOSTENVIRONMENT
PATHOGEN
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SPORANGIA
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FUSARIUM ROOT ROT or 4TH OF JULY DISEASE– FUSARIUM OXYSPORUM
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