Class: Loculoascomycetes
Fungi in this class are
distinguished by having bitunicate asci. These have two distinct, separable
walls.
Order: Dothideales
Family: Venturiaceae
Venturia
inaequalis
causes apple scab, an economically important disease affecting apple
leaves and fruit.
The fungus over winters mainly as developing pseudothecia on fallen
apple leaves. The cold of winter triggers ascus development and as the new
apple leaves unfold in the spring, asci mature and discharge their ascospores
up into the turbulent air after a good shower of rain.
Order: Dothideales
Family: Venturiaceae
Venturia inaequalis
causes apple scab, an economically important disease affecting apple leaves and fruit.
The fungus over winters mainly as developing pseudothecia on fallen apple leaves. The cold of winter triggers ascus development and as the new apple leaves unfold in the spring, asci mature and discharge their ascospores up into the turbulent air after a good shower of rain.