These dormant structures of survival can be classified in the following categories :

1) Soil borne fungi:

a) Dormant spores : Conidia (Peach leaf curl pathogen, Taphrina deformans), Chlamydospores (Wilt pathogen, Fusarium sp.), oospores (Downy mildew fungi), perithecia (Apple scab pathogen, Venturia inaequalis) etc.

Fig :I) oospore  

ii) Chlamydospores   

iii) Perithecium

b) Other dormant structures such as thickened hypha, sclerotia (Cottony rot fungus, Sclerotinia sclerotiorum), microsclerotia (Verticillium), Rhizomorphs (Armillaria mellea), etc.

fig :

I) Thickened hyphae   

ii) Sclerotia   

iii) Rhizomorphs   

iv ) Microsclerotia