Scientific publications

The objectives of the research were to determine the structure of nematode communities of species genus Kalanchoe Adans., to describe symptoms and determine thresholds of damage for the most dangerous plant-parasitic nematodes in greenhouses of Donetsk botanical Garden. There were 34 species of nematodes registered, 8 of which were plant-parasitic. The most common among free-living soil nematodes were Acrobeles ciliatus, Acrobeloides buetschlii, Cervidellus insubricus, Eudorylaimus carteri, E. obtusicaudatus, Aphelenchus avenae and Mononchus papillatus. The main causative agents of diseases were Rotylenchus robustus and Meloidogyne incognita. External symptoms of disease were expressed mainly in stunting, chlorosis, wilting and desiccation of the leaves, and in some cases, withering away of the root system. The most susceptible to plant-parasitic nematodes were K. faustii, K. orgyalis, K. pinnata, K. somaliensis, K. suarensis and K. velutina. In the case of R. robustus it was noted that in some instances even when there were less than 30 worms in 100 cm. of soil, growth inhibition and chlorosis of leaves were registered. In the case when 100 cm. of soil contained more than 600 worms, deformation, necrosis and desiccation of leaves, decay and death of the root system were registered.