The purpose of this experiment was to determine the influence of temperature and fungi colonizing fruit
plants on
Diaporthe
, a pathogenic fungus in Poland. The biotic series method was used to test
in vitro
the
effects of the fungi colonizing fruit trees on isolates of
Diaporthe
. Among the 13 fungal species tested, six
inhibited the growth and development of
Diaporthe
; while another two species were neutral and the rest
showed the lack of limiting impact in relation to the pathogen. Fungi present in the shoots of fruit plants was
able to limit the growth and development of
Diaporthe
spp., both in chemically-protected and non-protected
orchards. Studies on the effect of temperature indicated that the optimum temperature for vegetative growth
of isolates of
Diaporthe
ranged from 20°C to 30°C, and for conidial sporulation from 25°C to 30°C. Howev
-
er, the ability of
Diaporthe
sp. to survive at extreme temperature (–20°C and +35°C) enables their vegetative
growth in climatic conditions worldwide.