Plant parasitic nematodes from a forest tree nursery in southern Spain with some notes about the influence of soil storage on the quantitative recovery of Meloidogyne arenaria

Abstract

A nematological survey was carried out in a forest tree nursery in Andujar, southern Spain. Meloidogyne arenaria was found in soil and roots samples from Acacia sp., Biota sp., Juglans regia, Pinus spp., Salix babilonica and Sophora japonica. Pratylenchus vulnus was found in Acacia sp., Cupressus macrocarpa, Juglans regia, Ligustrum japonica, Morus sp., Pinus spp., Populus sp., Salix babilonica and Ulmus pumila. Helicotylenchus sp., Xiphinema americanum and Tylenchorhynchus sp. were found in all the plant species planted in the nursery. Paratylenchus sp., Criconemella sp. and Zygotylenchus guevarai host ranges are also given. The influence of soil storage on the recovery of M. arenaria was studied. At storage temperatures similar to those of the nursery (10-15°C), densities of M. arenaria in soil increased until the sixth week after sampling and were then maintained until the thirteenth week of storage. Incubation temperatures below 16°C during the migration of nematodes through a cottonwool filter, reduced the number of M. arenaria juveniles recovered after 15 h, but increasing migration time up to 39 h could counterbalance this reduction. Pflanzenparasitare Nematoden aus einer sudspanischen Forstbaumschulemit einigen Bemerkungen uber den Einfluss der Probenlagerung auf den quantitativen Nachweis von Meloidogyne arenaria - In einer Forstbaumschule in Andujar, Sudspanien, wurde eine nematologische Untersuchung durchgefuhrt. Meloidogyne arenaria wurde in Boden- und Wurzelproben von Acacia sp., Biota sp., Juglans regia, Pinus spp., Salix babilonica und Sophora japonica gefunden. Pratylenchus vulnus konnte an Acacia sp., Cupressus macrocarpa, Juglans regia, Ligustrum japonica, Morus sp., Pinus spp., Populus sp., Salix babilonica und Ulmus pumila nachgewiesen werden. Helicotylenchus sp., Xiphinema americanum und Tylenchorhynchus sp. wurden an allen Pflanzenarten gefunden, die in der Baumschule angebaut wurden. Ferner werden die Wirtspflanzen von Paratylenchus sp., Criconemella sp. und Zygotylenchus guevarai genannt. Dann wurde auch der Einfluss der Probelagerung auf den Nachweis von M. arenaria untersucht. Bei Lagerungstemperaturen von 10-15°C, die ahnlich waren wie die in der Baumschule, nahmen die Dichten von M. arenaria bis zur sechsten Woche nach der Probenahme zu und hielten sich dann bis zur 13. Woche der Lagerung. Temperaturen unter 16°C wahrend der Wanderung durch ein Baumwollwattefilter verminderten die Anzahl der nach 15h wiedergefundenen Juvenilen, doch konnte eine Verlangerung der Wanderzeit auf 39h diese Verminderung ausgleichen.

Forest Nursery Operations and Knowledge of Plant Parasitic Nematodes in Four Forest Districts of the Ashanti Region of Ghana

“…Greater proportion of the respondents (75%) were not aware that soil used for nursery could harbour potential pathogens that could cause severe diseases to seedlings while few (25%) of them were aware. Damage caused by nematodes is common in forest tree and ornamental plant nurseries [23]. Respondents' unawareness of plant parasitic nematodes could be the reason for their failure to uproot diseased seedlings to observe roots for diagnosis.…”

Plant Parasitic Nematodes of Tylenchida (Nematoda) Associated with Walnuts (Juglans regia L.) and Chestnuts (Castanea sativa Miller) Orchards in the Black Sea Region

“…Criconemalla xenoplax found in J. regia in Bulgaria (Peneva and Choleva, 1987). Paratylenchus juglansi from the rhizosphere of walnut in Kashmir, India, is described and figured (Kaul and Waliullah, 1989 Talavera et. al., (1999).…”