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Summary Meloidogyne enterolobii (Me) is an emerging root-knot nematode (RKN) and the most important worldwide for its high aggressiveness and increasing geographical distribution. In Mexico only in watermelon and tomato has been reported. Here we report the presence of this nematode in Jalapeño pepper collected in the state of Sinaloa. The morphological and morphometric characteristics of the second-stage juveniles and adult females were similar to those described for Me. DNA sequencing and alignment analysis (BLAST/GenBank) showed that the SCAR and rDNA IGS2 fragments had a 99 % of identity, with Me DNA sequences present in the database. The results obtained indicate that the RKN detected corresponds to M. enterolobii. To our knowledge, this is the first report of this nematode in chilli pepper in this region of Mexico, considered of major economic importance for the variety of vegetables grown and the extension of the area sown.

Meloidogyne enterolobii (= Meloidogyne mayaguensis) : a case study of a root-knot nematode species Meloidogyne enterolobii is currently seen as one of the upcoming plant parasitic nematodes. The progress of this nematode, first reported in 1991 from South Africa, from nearly forgotten to quarantine organism, is discussed.

Two assays were conducted to assess the influence of infective juveniles (IJs) of Heterorhabditis baujardi LPP7 on the embryogenesis and hatching of Meloidogyne mayaguensis. In the first assay, eggs were incubated in water alone or in the presence of infective juveniles, and completion of embryogenesis was evaluated 14 days later. In the second assay, unhatched second-stage juveniles were incubated in distilled water alone or in the presence of infective juveniles. Cumulative hatching was compared at various time intervals. Embryogenesis was not affected, whereas second-stage juveniles hatching was delayed probably because of the eggs permeability to noxious metabolites released by Photorhabdus luminescens, which is the bacterial symbiont of H. baujardi.

Meloidogyne mayaguensis on Psidium guajava in Rio Grande doNorte This paper reports the occurrence of Meloidogynemayaguensis on Psidium guajava cv. Paluma in the State of RioGrande do Norte, Brazil. O Laboratorio de Agricultura Irrigada da Escola Superiorde Agricultura de Mossoro – ESAM, Rio Grande do Norte,recebeu, em junho de 2003, amostras de solo de rizosfera degoiabeira ( Psidium guajava L.) cv. Paluma e sistemas radicularesdeficientes constituidos por poucas raizes, finas e necrosadas,coletadas em pomar com aproximadamente 500 plantas, comsete anos de idade, situado no municipio de Touros–RN.Segundo o proprietario, as plantas doentes expressavamsintomas de amarelecimento e declinio, e distribuiam-se emreboleiras.Para diagnostico, amostras foram encaminhadas aoLaboratorio de Fitonematologia da Universidade Federal Ruralde Pernambuco; das quais aliquotas de solo de 300 cm 3 foramdestinadas ao processamento por flotacao centrifuga, segundoJenkins (1964) (Plant Disease Reporter, v.48, p.692, 1964), e 10g de raizes para trituracao em liquidificador, por 20 s, associadaa flotacao centrifuga. Nas amostras de solo e de raiz foramdetectadas 440 e 11.380 formas juvenis do segundo estadio,respectivamente, de