Abstract

AREVALO, Jersys et al. Pochonia chlamydosporia (Goddard) Zare & Gams as potential biological control agent of Meloidogyne enterolobii (Yang & Eisenback) in vegetable crops. Rev. Protección Veg. [online]. 2012, vol.27, n.2, pp.123-129. ISSN 1010-2752.

Recently, Pochonia chlamydosporia (Goddard) Zare y Gams was isolated from parasitized eggs of Meloidogyne enterolobii Yang y Eisenback (syn. jun. Meloidogyne mayaguensis Rammah y Hirschmann) in guava (Psidium guajava L.) plantations, at the northeast of Brazil. Due to the potential danger of this pest for a large group of crops, including vegetable crops, a greenhouse experiment was conducted with two repetitions in time. The aim was to evaluate the saprophytic and parasitic activities of three brazilian strains (CG1003, CG1006 and CG1041) and the cuban strain (IMI SD 187) of P. chlamydosporia against M. enterolobii in a tomato (Solanum lycopersicum L.)- lettuce (Lactuca sativa L.) crop sequence. At the end of the cultivation, 6 month after the application, colonization of P. chlamydosporia was in the order of 10⁴ CFU.g^-1 of soil and 10³ CFU.g^-1 of root, with exception of the strain CG1041 (10² CFU.g^-1 of root). Egg mass percentage was higher than 60% in all treatments, while parasitized egg percentage was between 45-55%. These results validated the cuban strain against a nematode target under different conditions from those it originally came from; the brazilian strain potential as biocontroler of M. enterolobii was also demonstred. Future investigation perspectives with those fungi are opened for their use as biological control agents for nematode pest management strategies.

Keywords : nematophagous fungi; root-knot nematodes; vegetable.

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