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Fungi (Ascomycetes (General existence (include most devastating parasites…

- - - - Asexually they form the spores called the Conidia unlike the zygomycetes.
        Conidia are not formed inside sporangia, as are the asexual spores of most zygomycetes. Rather, they are produced externally at the tips of specialized hyphae called conidiophores, often in clusters or long chains, from which they may be dispersed by the wind.
  - - - American chestnut is highly susceptible to chestnut blight, caused by an Asian bark fungus (Cryphonectria parasitica, formerly Endothia parasitica) accidentally introduced into North America on imported Asiatic chestnut trees
        
        The airborne bark fungus spread 50 mi (80 km) a year and in a few decades girdled and killed up to three billion American chestnut trees.
      - Fusarium oxysporum f sp cubense
        
        Introduction