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
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
PLANT DISEASE TRIANGLE
ENVIRONMENT
PATHOGEN
HOST
FOMITOPSIS PINICOLA
RED BELT CONK
“BROWN CRUMBLY ROT”
SAPROTROPHIC FUNGI
SYCAMORE ANTHRACNOSE
NECROTROPHIC PATHOGENS
POWDERY MILDEW
HYPHAE ASCOCARPS
BIOTROPHIC PATHOGENS
Growth of Fungi in Plants HYPHAE
PATHOGENESISPATHOGENESIS
TOXINSTOXINS
ENZYMESENZYMES
GROWTH REGULATORSGROWTH REGULATORS
RHYTISMA PUNCTATUM
ACER MACROPHYLLUM
Cedar root rotPhytophthora lateralis
Asexual Reproduction of Fungi
Oomycetes- Zoospores
Ascomycetes - Conidiospores
SWISS NEEDLE CAST
PHAEOCRYPTOPUS GAEUMANNII
Sexual Reproduction of Fungi
Ascospores
CROP ROTATION
FUMIGATION
PRECISION SOWING
PLANT DISEASE TRIANGLE
ENVIRONMENT
PATHOGEN
HOST
DAMPING OFF– PYTHIUM – a Watermold
HOSTENVIRONMENT
PATHOGEN
SPORANGIA Release Zoospores
SEXUAL OOSPORES
FUSARIUM ROOT ROT or 4TH OF JULY DISEASE– FUSARIUM OXYSPORUM
HOSTENVIRONMENT
PATHOGEN
TOP BLIGHT– PHOMA, FUSARIUM
HOSTENVIRONMENT
PATHOGEN
WINTER INJURY--ABIOTIC
“STORAGE BLIGHT” -- ABIOTIC
PHYTOPHTHORA ROOT ROT IN DOUGLAS-FIR
SPORANGIA
HOSTENVIRONMENT
PATHOGEN
OOSPORE
DAMPING OFF– PYTHIUM
HOSTENVIRONMENT
PATHOGEN
SPORANGIA
FUSARIUM ROOT ROT or 4TH OF JULY DISEASE– FUSARIUM OXYSPORUM
