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Plant Diseases (FUNGI (FUNGAL LIKE (PROTOZOA (MYXOMYCETES Slime molds …

- - - - CHARACTERISTICS
        
        Unicellular
        
        Amoeboid, plasmodium
        
        multinucleate
        
        zoospores (2fla)
        
        eg. SLIME MOLDS
      - MYXOMYCETES
        
        Slime molds
        
        Amoeboid mass of protoplasm
        
        Fructifications
        
        Plasmodium
        
        saprophytes
        
        SYMPTOMS
        
        Creamy coloured slime molds
        
        fructifications
        
        HOSTS
        
        Turf grass
        
        Strawberry
        
        Vege
        
        CAUSAL PATHOGEN
        
        Physarum
        
        Fuligo
        
        CONTROL
        
        Fungicides
      - PLASMODIPHOROMYCETES
        
        Obligate parasite
        
        Zoospores (moves in water soil)
        
        Vector Polymyxa graminis
        
        CLUBROOT CRUCIFER
        
        SYMPTOMS
        
        club root
        
        leaf yellowing
        
        wilting
        
        spindle like root
        
        CAUSAL PATHOGEN
        
        Plasmodiophora brassicae
        
        CONTROL
        
        Avoid grow cruciferous
        
        Well drainage
        
        Fungicide
    - - CHARACTERISTICS
        
        Uni and Multicellular
        
        Filamentous / Colonial
        
        Mycelia ada cellulose and glucan
        
        aseptate
        
        asexual & sexual spores
      - OOMYCETES -
        
        Cellulose
        
        aseptate
        
        oospores (sex)
        
        zoospores (asex)
        
        PHYTIUM
        
        damping off
        
        root rot
        
        soft rot
        
        SYMPTOMS -
        
        Young seedlings dead
        
        fail to germinate
        
        shrink
        
        basal part become soft & thinner
        
        CAUSAL PATHOGEN
        
        Phytium spp.
        
        CONTROL
        
        Sterilize soil
        
        Sterilize tools, containers
        
        Good drainage
        -Good circulation
        
        Avoid excess nitrogen
        
        Fungicides
        
        Seed treatment
        
        PHYTOPHTHORA
        
        Stem & Root rot
        
        SYMPTOMS
        
        Wilting
        
        Yellowing
        
        Dark brown to black at base
        
        CAUSAL PATHOGEN
        
        Phytophtora infestans
        
        CONTROL
        
        Soil free
        
        Resistant var
        
        Sterilize equipments
        
        Fungicides
        
        Biocontrol
        
        LATE BLIGHT POTATO
        
        cool moist weather
        
        Kill foliage
        
        Storage
        
        SYMPTOMS -
        
        Water soaked spots
        
        cholorotic borders
        
        Purplish blotches (lebam)
        
        firm, dry, sunken ( late)
        
        rotting
        
        CAUSAL PATHOGEN
        
        Phytophtora infestans
        
        CONTROL
        
        Cultural practices
        
        Resistant var
        
        Avoid planting same family
        
        chemical treatment
        
        DOWNY MILDEW
        
        PRESENCE OF FILM WATER, INCREASE SEVERITY
        
        SYMPTOMS-
        
        White patches underside
        
        Browning upper surface
        
        Irregular spots
        
        CAUSAL PATHOGEN
        
        Plasmopara viticola
        
        CONTROL-
        
        Fungicides