Meloidogyne incognita (Kofoid and White, 1919) Chitwood 1949 y Meloidogyne arenaria (Neal 1889) Chitwood 1949: root- knot nematodes in guava (Psidium guajava L.) C.V. apple in Monteria, Córdoba

Meloidogyne incognita (Kofoid and White, 1919) Chitwood 1949 y Meloidogyne arenaria (Neal 1889) Chitwood 1949: Nematodos de las nudosidades radiculares en Guayaba (Psidium guajava L.) c.v manzana en Montería, Córdoba

The objective of the present research was to identify at the species level and using morphological and morphometric parameters the root-knot nematode present in guava’s crop in Monteria. Samples from roots and ryzospheric soil were taken and the female, male and second stage juvenile larvae (J2) were obtained using the acid sodium hypochlorite-fuscine, mesh centrifuge and egg mass eclossion, respectively. Two types of perineal patterns were observed: the first one with high square dorsal arch, stilettos with 14 to 16 µm, flat and wide nodules and DGO distance of 2 to 4 µm. The males showed a rounded lip disc and centrally concave stilettos with 22 to 25 µm, flat and rounded nodules and a DGO distance of 2 to 4.5 µm, a typical fact of the M. incognita species. The second patterns has low and rounded dorsal arch. The strives form a shoulder, stilettos with 13 to 17 µm, wide and rounded nodules in the posterior zone, the DGO distance was 3 to 6 µm. All this characteristics are typical of the M. arenaria species. The results showed for first time the simultaneous presence of M. incognita and M. arenaria attacking guava’s crop in the Colombian Caribbean Coast.

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