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Scientia fungorum
versión On-line ISSN 2594-1321
Resumen
MOO KOH, Felicia Amalia et al. Interspecific incompatibility of Trichoderma species against Meloidogyne incognita in Solanum lycopersicum. Sci. fungorum [online]. 2018, vol.47, pp.37-45. ISSN 2594-1321.
Background
The biological control of phytopathogens is improved by incorporating native strains of biocontrol agents; this is the case of Trichoderma spp. The control effect is higher when are applied groups of organisms and show incompatible interactions with increase antagonism.
Objective
The objective of the present study was to identify and evaluate in vitro the interspecific relation of native Trichoderma spp., and the antagonistic effect of incompatible species against Meloidogyne incognita.
Methods
The isolates of Trichoderma spp. were evaluated among them in dual culture, 45 dual cultures were performed, the four with greater incompatibility: T. virens (Th27-08) /T. harzianum (Th33-59), T. citrinoviride (Th33-58) /T. harzianum (Th33-59), T. virens (Th43-13) /T. ghanense (Th26-52) y T. simmonsii (Th09-06) /T. harzianum (Th33-59) and were evaluated against M. incognita in Solanum lycopersicum, in greenhouse.
Results and conclusions
The results showed interactions incompatible with significant differences (P≤0.01) against the nematode in relation to the control without fungal inoculants, reductions of 50.8-83.0% in the severity of the radical damage were estimated, 25.7-80.3% in the number of eggs and 31.5-94.1% in the number of females. The best effect was observed in the confrontation of T. citrinoviride (Th33-58) /T. harzianum (Th33-59) when compared to the Oxamil 24% control.
Palabras llave : antagonism; competition for space; native isolates; phytopathogenic nematode; Trichoderma citrinoviride.