Hamza M. A. auteur aut IRD Lakhtar H. auteur aut IRD Tazi H. auteur aut IRD Moukhli A. auteur aut IRD Fossati-Gaschignard O. auteur aut IRD Miche L. auteur aut IRD Roussos Sevastianos auteur aut IRD Ferji Z. auteur aut IRD El Mousadik A. auteur aut IRD Mateille Thierry auteur aut IRD Boubaker H. auteur aut IRD text journalArticle eng text/pdf born digital access Plant-parasitic nematodes are major pests in agriculture. Microbial antagonists such as nematophagous fungi are of great interest for developing alternative biocontrol strategies to replace nematicide use. This study aims to isolate, identify and assess the diversity and the in vitro predatory activity of nematophagous fungi from various olive nurseries in Morocco. A total of 305 soil samples were collected in 25 nurseries in Moroccan olive-producing areas (Jbala, Guerouane, Haouz and Souss). Seventy-three pure fungal strains from nematophagous fungi were recovered from nursery substrates infested with root-knot nematodes. Diversity indices showed that fungi were more numerous in southern regions, whereas fungal communities were more numerically alike in northern regions, partly depending on the occurrence of root-knot nematodes. One fungal strain, Talaromyces assiutensis, killed all Meloidogyne javanica juveniles during in vitro predation tests. Orbiliaceae (Arthrobotrys spp., Drechslerella brochopaga, Monacrosporium spp.) trapped 50 to 80% of juveniles. Purpureocillium and Trichoderma species killed 30 to 50% of juveniles. The diversity of nematophagous communities could be affected by the north-south climate gradient of Morocco, by their nematode prey expansion, and, to a lesser extent, by the habitat origin of the substrates used. Talaromyces assiutensis was the most efficient nematophagous species against M. javanica. The use of native nematophagous fungi is a promising alternative strategy for nematode control in olive nurseries and to prevent nematode introduction into olive orchards. specialized Culture substrate Ecology Fungal antagonists Olive tree Root-knot nematode MAROC 084 076 114 14-23 2017 1049-9644 https://www.documentation.ird.fr/hor/fdi:010071041 10.1016/j.biocontrol.2017.07.011 1049-9644 [F B010071041] https://www.documentation.ird.fr/hor/fdi:010071041 https://www.documentation.ird.fr/intranet/publi/2017/10/010071041.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2017-10-31 2023-07-11 fdi:010071041 fre