Abstract

CARDONA-PIEDRAHITA, Luisa Fernanda; CASTANO-ZAPATA, Jairo  and  CEBALLOS-AGUIRRE, Nelson. Reaction of fifteeen introductions of wild tomato cherry (Solanum lycopersicum L.) to root knob nematode (Meloidogyne spp. Goeldi) and identification of species. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2016, vol.40, n.156, pp.450-460. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.365.

Meloidogyne spp. is a problem of great economic importance in tomato Cherry, causing yield losses ranging from 25 to 50%, which conduce to look for wild materials resistant or promising. The objective of this work was to contribute to the knowledge of the epidemiology of the root knob nematode, caused by Meloidogyne spp. in fifteen introductions of wild tomato Cherry planted at free exposition and semi cover, and to determine the species of Meloidogyne present in the crop. The experimental design was a split plots, the main plots were the two production systems, the subplots, the tomato introductions, with four replications and four plants per replication. Was determined the root damage caused by the nematode and the identification of the species in both females and juveniles (J2). It was conducted an analysis of variance and Duncan's tests. According to the analysis, at free exposition, the population of nematodes ranged between 29.472 in IAC1624 and 170.804 in IAC421 with an average of 97.677 nematodes and under semi cover, ranged between 57.871 in IAC391 and 197.800 in LA2692 with an average of 108.572 nematodes, which demonstrate that under this system the cycle of the nematode is reduced, increasing its population. According to the perineal pattern of the females, were identified two species of the nematode: Meloidogyne incognita with a frequency of 80% and M. javanicawith a frequency of 20%.

Keywords : Tomato; Free exposition; Semi cover; Meloidogyne incognita; Meloidogyne javanica.

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