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Morpho-biological notes and histopathology, based on LM and  SEM  observations, of the fig cyst nematode    Heterodera   fici    isolated from    Ficus   carica    roots, collected in home and public gardens of Apulia region, southern Italy, are described and illustrated. Seventy-five localities throughout the Apulia region were sampled and one-quarter of the sampled localities had fig roots infested with    H.   fici   , with population densities ranging from 44 to 180 cysts/100 ml of soil. All attempts to detect    H.   fici    on ornamental    Ficus    spp. as well as on imported bonsai in Italy were unsuccessful. Morphometric characters of the Italian population conform to those of the type and re-description populations reported for    H.   fici   . Molecular analysis using ITS, D2–D3 expansion domains of the 28S rRNA, and the partial 18S rRNA sequences of    H.   fici    newly obtained in this study matched well with the corresponding sequences of    H.   fici    present in the GenBank database. Phylogenetic trees confirmed and supported the grouping of    H.   fici    in the Humuli group.    Heterodera   fici    completes its embryogenic development in 14–16 days at 25 °C. Post-invasion development and maturity in the roots of    F.   carica    seedlings is completed in 64–68 days at 25–28 °C with juveniles and adults showing different parasitic habits, being endoparasitic and semi-endoparasitic respectively. The establishment of permanent feeding sites that consist of the formation of large syncytia causes anatomical modification of vascular elements and general disorder in the root stelar structures. Syncytia structures associated with mature females showed different degrees of vacuolisation, numbers of syncytial cells, and contained nuclei and nucleoli which were constantly hypertrophied.

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Integrative diagnosis, biological observations, and histopathology of the fig cyst nematode    Heterodera   fici    Kirjanova (1954) associated with    Ficus   carica    L. in southern Italy