(1) The asexual spore, or conidium , is formed from the tips of specialized spore-forming cells in a precisely regulated developmental plan.(2) Fungi of this genus produce characteristic darkly pigmented, septate hyphae or conidia .(3) Spores or conidia are carried from the soil surface or debris to the plant by wind or splashing rain.(4) Conidiophores terminally differentiate at the tips to yield multinucleated asexual spores, termed conidia .(5) In many plant pathogenic fungi, conidia are the infectious propagules responsible for initiating infection as well as disease dissemination.
