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Cadaman (
Prunus persica L. Batsch. x
Prunus davidiana Carr. Franch.) behaviour towards a partially virulent isolate of
Meloidogyne javanica (Treub.) Chitwood |
Cahiers Agricultures. Volume 12, Number 2, 93-7, Mars-Avril 2003, Note de recherche
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 Résumé
Article gratuit
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Author(s) : Najet Horrigue‐Raouani, Amina Ghariani‐Abdelwahed, Abdessatar Jaziri, Sadreddine Kallel, Mohamed Mouldi B‘Chir |
Summary : An unexpected mortality of over 20% has been observed in Tunisia (Tebourba region), in a one‐year‐old peach plantation, grafted on Cadaman as a resistant standard rootstock. This mortality is due to the infestation of the rootstock by the root‐knot nematode (RKN),
Meloidogyne javanica. Macroscopic and histopathological investigations of the Cadaman infestation lead to the conclusion that it would be a partially virulent isolate of the RKN. An important cellular hyperplasic reaction and numerous galls were observed on infested roots (some galls were larger than 10 mm). Later, most of the feeding sites induced by nematodes showed a hypersensitive reaction, leading to the nematode death. Novibiotec 7996, applied at 10 mL\\tree as a biological control treatment, followed by only one nematicide Cadusafos liquid application at 3 mL\\tree, were sufficient to remove the orchard infestation and to stop plantlet mortality. |
Keywords : Pathology\; Vegetal physiology. |
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