Abstract

JARABA, Juan de Dios; LOZANO, Zaida  and  ESPINOSA, Manuel. Root knot nematodes associated with papaya crop (Carica papaya L.) in department of Córdoba, Colombia. Agron. colomb. [online]. 2007, vol.25, n.1, pp.124-130. ISSN 0120-9965.

Nematode species associated with papaya crop (Carica papaya L) were characterized in Cordoba, Colombia by using morphological and morphometric parameters of their females, males, and infective second-stage juveniles (J2). Soil samples were taken from papaya plantations in order to evaluate soil texture, organic matter (OM), pH, electric conductivity (EC), and, finally, presence of root knot nematodes in the soil. Correlation analysis was performed to correlate soil variables with the presence of Meloidogyne species. Meloidogyne incognita, M. arenaria and M. javanica were found, whereas M. incognita was the most frequent specie. These three species were found together in 37.5% of the soils of papaya plantation; M. incognita and M. arenaria were mixed in 50%, while M. javanica and M. incognita were not mixed. Conducive soils to Meloidogyne species had pH 4.9 to 6.4, EC 0.1 to 0.45 dS· m^-1, OM 1.2 to 2.5 %, and sandy to sandy-loam soil texture. The pH, percentages sand and CE were positively correlated with an abundance of Meloidogyne species, whereas OM was negatively correlated. This is the first report of M. javanica, M. incognita and M. arenaria, and the mixture of M. incognita and M. arenaria in papaya plantations of Colombia.

Keywords : Meloidogyne javanica; M. incognita; M. arenaria; soil variables.

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