© Benaki Phytopathological Institute
Effect of
Saccharomyces cerevisiae
on the root-knot nematode in tomato
39
Discussion
Chemical control using nematicides to man-
age plant-parasitic nematodes is usually
an expensive and environmentally hazard-
ous approach and may also negatively af-
fect agricultural soil beneficial microflora.
Therefore, searching for nematicide alterna-
tives to manage plant-parasitic nematodes
would be crucial. Some microbial agents
have been reported as suppressive for nem-
atodes especially RKNs (Youssef and Soli-
man, 1997; Goswami
et al
., 2008; Jamshidne-
jad
et al.
2013).
The yeast fungus
S. cerevisiae
was simi-
larly effective as the systemic nematicide ox-
amyl when applied as a drench on the rhizo-
spheric soil region, causing a significant
decrease in tomato root galling and reduc-
ing the reproduction ability of
M. javanica
on tomato roots under the field conditions
of Karak Valley region of Jordan. The yeast
was also able to reduce infectivity and popu-
lations of
M. javanica
on cucumber (Karajeh,
2013). As previously reported, the applica-
tion of 120g/tree of dry active yeast
S. cerevi-
siae
FT 700 greatly reduced the populations
of
Pratylenchus zeae
and
Helicotylenchus ex-
allus
in both soil and roots of Jasmine
, Jas-
minum grandiflorum
L. (Ismail
et al
., 2005).
Figure 3.
Effects of different treatments [HP: hydrogen peroxide, VD: Vydate (oxamyl), YS: yeast (
Saccharomyces cerevisiae
)]
on (A) root galling caused by the root-knot nematode (
Meloidogyne javanica
) and (B) on its reproduction on tomato.
