Effects of different organic fertilization on the community structure of plant parasitic nematodes in organic raspberry production


Abstract: Growing raspberries (Rubus idaeus L.) occupies an important place in the fruit production of many European countries. The farmers’ interest in organic fruit growing is increasing, however, a limiting factor in sustainable production of raspberries is the presence of plant parasitic nematodes, which cause significant economic damage. The aim of this work was to determine the effect of the various fertilization schemes in organic production of raspberries on the density and community structure of migratory root nematodes and the degree of the differences between them. The investigation of the nematode communities was carried out in the region of Sofia, in the town of Kostinbrod in 2013 to 2015, with cultivars ‘Willamette’ and ‘Lyulin’. Pratylenchus spp. were the dominant plant parasitic nematodes. They were established in associations of populations with species of the following genera: Trichodorus, Paratrichodorus, Longidorus, Xiphinema, Paratylenchus, Helicotylenchus, Geocenamus, Tylenchorhynchus and Tylenchus, which were found in different densities and abundance during the research period. Correlations between nematode density and different organic fertilizers were found. The study of the species composition of migratory root nematodes contributes not only to the effects of different organic fertilization on the community structure of plant parasitic nematodes, but is also a prerequisite for ensuring the plant health and the cropping potential of raspberry.

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