INVESTIGADORES
BECERRA Alejandra Gabriela
congresos y reuniones científicas
Título:
Effect of Steinernema rarum and its symbiotic bacterium Xenorhabdus szentirmaii on Nacobbus aberrans.
Autor/es:
LAX P.; RONDAN DUEÑAS J., CACCIA M.; MARRO N.; BECERRA A.; DOUCET M.
Reunión:
Congreso; XLV ONTA Annual Meeting; 2013
Resumen:
Entomopathogenic
nematodes (EPN) (families Steinernematidae and
Heterorhabditidae) are used as biological control agents of insect pests. Infective
juveniles (IJ) of the nematode carry symbiotic bacteria (SB) in their intestine
that kill the host. The EPN-SB
complex has been shown to have an antagonistic effect on certain
plant-parasitic nematodes. The
SB Xenorhabdus szentirmaii
was isolated from an Argentine isolate of Steinernema
rarum. The
nematicidal activity of the SB on second stage juveniles and on hatching of Nacobbus aberrans eggs was evaluated in vitro. In
addition, under controlled conditions the effect of IJ application of the EPN in
the soil was analyzed, as well as the effect of the SB and its metabolites on N. aberrans in tomato. The results
showed that the number of galls and the reproduction factor of the
plant-parasitic nematode decreased significantly in the treated plants, both in
sterile and non-sterile soil. The results obtained show the promising potential
of the NEP-SB complex for the management of N.
aberrans.