As a result of the studies of plant-parasitic nematodes of trees and shrubs on the territory of Donetsk Botanical
Garden for the first time for Donbass and Ukraine was recorded Helicotylenchus digonicus Perry, 1959
(Tylenchida: Hoplolaimidae) – polyphagous root semi-endoparasite. The paper contains description, mor-
phological and morphometric characteristics of recorded populations, trophical associations, and brief data
on the distribution, biology, ecology and harmfulness of the species. The morphometrics of the Donbass popu-
lations generally are in agreement with topotypes, but in comparison with other populations regional isolates
has some differences. The species is the dominant among all plant-parasitic nematodes. It was found in the
rhizosphere of 29 species of plants. The highest population density was recorded on Fraxinus excelsior L.,
Juglans regia L., Robinia pseudoacacia L. and Tilia europaea L.

A.I. Gubin