Characteristics of oomycetes; features of class oomycetes

Oomycetes:
– they are fungi that produce oospore (egg)
– cause several parasitic disease of plant, fish, insect and human
– some are saprophytes or weak parasites
– most develop mycelia of indefinite form
– Actively growing haphae
– cross walls separate reproductive from vegetative hyphae
– Asexual reproduction occurs in the presence of ample food supply
– occur by formation of spores in sporangia
– sexual reproduction (gametangial copulation) by oogonia and antheridia
– the class is divided into two order: saprolegniales (saprolegniasp) and perenosporale (perenospora, phytophthora sp.)