Ecological analysis of the host specificity of plant-parasitic nematodes associated with some cultivated ornamentals in Martinique (French West Indies).
During a survey of ornamental plants conducted in Martinique in 1992, 498 soil and root samples were collected from ornamental plant species belonging to 3 families, the Araceae, Zingiberaceae and Strelitziaceae, a further 50 root samples were taken from Anthurium grown in artificial substrates. 27 plant parasitic nematode species belonging to 18 genera were found, including one new species, Criconema ornativulvatus sp. nov. and 2 new records for Martinique: Helicotylenchus pseudorobustus and Monotrichodorus sacchari. Nematode populations differed with the different ornamentals but Rotylenchulus reniformis was the dominant species in all the soils. Except for a few single species of Trichodoridae, Criconematidae, Longidoridae and Tylenchulidae certain species were dominant on certain plants, e.g. Meloidogyne spp. on ginger lilies, Radopholus similis on Anthurium, Aorolaimus luci on red torch ginger and Pratylenchus coffeae on Alocasia. The possible damages of these plant parasitic species to flower cultivation and production is discussed.