number of CFU:berry found 3 weeks after a
single spray did not differ from that found on
clusters sprayed weekly (Fig. 3A). Both isolates
survived well on fruit stored for one month at 0
or 20°C (Fig. 3B).
3.5. Field experiments
Figs. 4 and 5 summarize the effects of the
different treatments on decay development in
wine and table grapes, respectively. The predominant
rot pathogen in the experiments on wine
grapes, conducted in the Golan heights, was Aspergillus
niger affecting 32, 7 and 37% of the
clusters in the untreated control in 1996, 1997 and