φουζικλάδιο αχλαδιάς → pear scab
φουζικλάδιο μηλιάς → apple scab
Venturia pyrina is a species of fungus in the Venturiaceae family. A plant pathogen, it causes scab or black spot of pear. It has a widespread distribution in temperate and subtropical regions wherever pears are grown
https://en.wikipedia.org/wiki/Venturia_pyrina