© Benaki Phytopathological Institute
Darras
et al.
74
40 to 60 dpi. Nevertheless, 40 dpi, all ex-
perimental plants of var. ‘Katsari Santorinis’
showed disease symptoms (DI=100%) (Ta-
ble 2).
Based on the above-mentioned results,
var. ‘Katsari Santorinis’ was found to be
more susceptible to
F. oxysporum
f. sp.
lyco-
persici
infection compared to ‘Chondrokat-
sari Messinias’, as the former showed sig-
nificantly (P < 0.05) higher disease levels 60
dpi compared to the latter (Table 1). The re-
sults of the present study also showed that,
60 dpi, vars ‘Chondrokatsari Messinias’ and
‘Katsari Santorinis’ showed similar suscepti-
bility to infection by
R. solani
(Table 2).
Effects of F. oxysporum f. sp. lycopersici
infection of tomato plants on biomass
production, number of flowers A
s
, g
s
and
E
The results of the present study showed
that FW and DW of the aerial parts of var.
‘Chondrokatsari Messinias’ inoculated with
F.
oxysporum
f. sp.
lycopersici
were significant-
ly (P < 0.05) lower compared to those of the
control plants 60 dpi (Figure 3). However, FW
Figure 1.
Light to dark brown lesions (arrows) on roots of
‘Katsari Santorinis’ tomato plants (A) and discoloration (ar-
rows) of the vascular system of ‘Chondrokatsari Messinias’ to-
mato plants (B) inoculated with
Fusarium oxysporum
f. sp.
ly-
copersici
60 dpi.
Figure 2.
Dark brown cankers (arrows) on the stem base of
‘Chondrokatsari Messinias’ tomato plants as a result of their
infection by
Rhizoctonia solani
(A) 60 dpi. Collar rot symptoms
on ‘Katsari Santorinis’ tomato plants inoculated with
R. solani
(B).
Table 1.
Disease severity index (DSI; scale 0–4) and disease incidence (DI; % plants with
symptoms) on tomato plants of vars ‘Chondrokatsari Messinias’ and ‘Katsari Santorinis’ inoc-
ulated with
Fusarium oxysporum
f. sp.
lycopersici.
DSI and DI are means of six replicates and
were recorded 40 and 60 days post- inoculation
(dpi). Means followed by different letters are
statistically different according to the Duncan’s Multiple Range test (
P
= 0.05)).
Variety
Treatment
DSI
(scale 0–4)
DI
(%)
dpi
40
60
40
60
‘Chondrokatsari Messinias’
Control
0
0
0
0
F. oxysporum
f. sp.
lycopersici
0.67 a
1.00 a
33 a
50 a
‘Katsari Santorinis’
Control
0
0
0
0
F. oxysporum
f. sp.
lycopersici
0.50 a
2.50 b 67 ab 100 b
